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Mahy Grégory - One of the best experts on this subject based on the ideXlab platform.
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:Description of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled.Peer reviewe
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
Presses Agronomiques de Gembloux, 2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:peer reviewedaudience: researcher, professionalDescription of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled
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Comparison of mining spoils to determine the best substrate for rehabilitating limestone Quarries by favoring native grassland species over invasive plants
'Elsevier BV', 2019Co-Authors: Pitz Carline, Mahy Grégory, Harzé Mélanie, Uyttenbroeck Roel, Monty ArnaudAbstract:peer reviewedaudience: researcher, professional, popularizationHabitats being restored in Belgian Quarries are easily invaded by non-native plant species, which can hamper the germination and development of vegetation deemed to be of high conservation value. Substrates of terraces created when mining limestone Quarries could be inhospitable to native plants. However, they can provide opportunities for establishing specific vegetation, such as dry calcareous grasslands. Applying suitable mining spoils could be a cost-effective way to provide growing substrate when restoring limestone terraces. We assessed the efficacy of using mining spoils, collected on-site, as a potential growing substrate (bedding material). We tested gravely limestone (product of on-site mining activities), limestone dust (by-product), and no addition (bare limestone bedrock) to determine which was best for favoring the growth of native, dry calcareous grassland species and discourage the growth of two non-native invasive species that commonly invade altered mining sites: Buddleja davidii Franch and Senecio inaequidens DC. In a field experiment (in two Quarries), we studied short-term (2 y) growth response of native and invasive species after sowing three seed mixtures of native grassland species, varying in functional diversity (and one no-sowing control treatment), all treatments subjected to competitive pressure exerted by invasive species. Percent cover of native and invasive species, species abundance and reproductive characteristics of the invasive species were monitored during 2-y. Native grasslands coverage was low on all substrate types, demonstrating how slowly calcareous grasslands species establish in such harsh substrate conditions. However, type of substrate did show a significant relationship with plant abundance, with limestone dust being the most beneficial for native species establishment (coverage). Although limestone dust appeared to be the best option for restoring grassland species to limestone Quarries (based on its low cost, wide availability, and potential to support native species), it was also likely to support the two invasive species. Functional diversity of the seed mixture had no consistent effect. Our study shows the importance of identifying the most appropriate substrate to both establish calcareous grasslands and resist invasive species. This approach provides insights into developing strategies to conserve biodiversity in industrial and agricultural landscapes with limestone Quarries
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Managing invasive plants in quarry sites - Patterns, issues and opportunities
2018Co-Authors: Monty Arnaud, Ortmans William, Mahy GrégoryAbstract:audience: researcher, studentDescription of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and represent additional rehabilitation costs. The situation of plant invasion in Quarries is unknown. Objectives. The aims were to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded sectors. Method. We surveyed 6 692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien plants in Belgium. Results. 14 species were recorded, and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch.and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were concerned by invasion. Conclusion. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, the issue should be better tackled
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Managing invasive plants in quarry sites - Patterns, issues and opportunities
2018Co-Authors: Monty Arnaud, Ortmans William, Mahy GrégoryAbstract:Description of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and represent additional rehabilitation costs. The situation of plant invasion in Quarries is unknown. Objectives. The aims were to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded sectors. Method. We surveyed 6 692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien plants in Belgium. Results. 14 species were recorded, and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch.and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were concerned by invasion. Conclusion. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, the issue should be better tackled
Monty Arnaud - One of the best experts on this subject based on the ideXlab platform.
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:Description of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled.Peer reviewe
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
Presses Agronomiques de Gembloux, 2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:peer reviewedaudience: researcher, professionalDescription of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled
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Comparison of mining spoils to determine the best substrate for rehabilitating limestone Quarries by favoring native grassland species over invasive plants
'Elsevier BV', 2019Co-Authors: Pitz Carline, Mahy Grégory, Harzé Mélanie, Uyttenbroeck Roel, Monty ArnaudAbstract:peer reviewedaudience: researcher, professional, popularizationHabitats being restored in Belgian Quarries are easily invaded by non-native plant species, which can hamper the germination and development of vegetation deemed to be of high conservation value. Substrates of terraces created when mining limestone Quarries could be inhospitable to native plants. However, they can provide opportunities for establishing specific vegetation, such as dry calcareous grasslands. Applying suitable mining spoils could be a cost-effective way to provide growing substrate when restoring limestone terraces. We assessed the efficacy of using mining spoils, collected on-site, as a potential growing substrate (bedding material). We tested gravely limestone (product of on-site mining activities), limestone dust (by-product), and no addition (bare limestone bedrock) to determine which was best for favoring the growth of native, dry calcareous grassland species and discourage the growth of two non-native invasive species that commonly invade altered mining sites: Buddleja davidii Franch and Senecio inaequidens DC. In a field experiment (in two Quarries), we studied short-term (2 y) growth response of native and invasive species after sowing three seed mixtures of native grassland species, varying in functional diversity (and one no-sowing control treatment), all treatments subjected to competitive pressure exerted by invasive species. Percent cover of native and invasive species, species abundance and reproductive characteristics of the invasive species were monitored during 2-y. Native grasslands coverage was low on all substrate types, demonstrating how slowly calcareous grasslands species establish in such harsh substrate conditions. However, type of substrate did show a significant relationship with plant abundance, with limestone dust being the most beneficial for native species establishment (coverage). Although limestone dust appeared to be the best option for restoring grassland species to limestone Quarries (based on its low cost, wide availability, and potential to support native species), it was also likely to support the two invasive species. Functional diversity of the seed mixture had no consistent effect. Our study shows the importance of identifying the most appropriate substrate to both establish calcareous grasslands and resist invasive species. This approach provides insights into developing strategies to conserve biodiversity in industrial and agricultural landscapes with limestone Quarries
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Managing invasive plants in quarry sites - Patterns, issues and opportunities
2018Co-Authors: Monty Arnaud, Ortmans William, Mahy GrégoryAbstract:audience: researcher, studentDescription of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and represent additional rehabilitation costs. The situation of plant invasion in Quarries is unknown. Objectives. The aims were to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded sectors. Method. We surveyed 6 692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien plants in Belgium. Results. 14 species were recorded, and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch.and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were concerned by invasion. Conclusion. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, the issue should be better tackled
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Managing invasive plants in quarry sites - Patterns, issues and opportunities
2018Co-Authors: Monty Arnaud, Ortmans William, Mahy GrégoryAbstract:Description of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and represent additional rehabilitation costs. The situation of plant invasion in Quarries is unknown. Objectives. The aims were to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded sectors. Method. We surveyed 6 692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien plants in Belgium. Results. 14 species were recorded, and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch.and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were concerned by invasion. Conclusion. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, the issue should be better tackled
Martin Konvicka - One of the best experts on this subject based on the ideXlab platform.
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can Quarries supplement rare xeric habitats in a piedmont region spiders of the blansky les mts czech republic
Land Degradation & Development, 2008Co-Authors: Robert Tropek, Martin KonvickaAbstract:Although there is growing evidence that post-industrial barrens such as Quarries can harbour a substantial proportion of species diversity formerly associated with traditional rural landscapes, most of the evidence originated from limestone Quarries in relatively warm areas, while minimum studies exist for cool regions and acidic substrates. We used pitfall trapping to study spiders colonising three Quarries in a piedmont region of southwestern Czech Republic. We compare samples from the Quarries with adjoining seminatural localities using both univariate and multivariate analyses. Samples from the Quarries contained less species per trap, but endangered species occurred both in the Quarries and outside of them, and some were sampled in the Quarries only. Compared to the seminatural localities, Quarries were colonised by species preferring lighter and more open vegetation. These species had, in average, more restricted distribution in the Czech Republic, suggesting that the Quarries indeed attracted specialists of early successional habitats that are increasingly rare in modern landscapes. Prospects of such species depend on future restoration policy in existing Quarries. To safeguard them, spontaneous succession should be preferred over engineered reclamation. Copyright © 2007 John Wiley & Sons, Ltd.
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proximity of valuable habitats affects succession patterns in abandoned Quarries
Ecological Engineering, 2006Co-Authors: Jan Novak, Martin KonvickaAbstract:The study tested the hypothesis that the composition of vegetation formed during primary succession in basalt Quarries is affected by the distance to, and area of, conservation-valuable biotopes of surrounding xerophilous grasslands. The successional vegetation was recorded in 270 relev´ es collected in 34 Quarries in the area of Ceske Stredohori Hills, Czech Republic. We used detrended correspondence analysis to visualise the relationship between successional vegetation, ages of individual sites, and
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limestone Quarries as refuges for european xerophilous butterflies
Conservation Biology, 2003Co-Authors: Jiři Benes, Pavel Kepka, Martin KonvickaAbstract:: The large-scale decline of traditionally managed early-successional habitats caused by the joint effects of agricultural intensification and abandonment of marginal lands has resulted in a continent-wide decline of xerophilous butterflies throughout Europe. The question is whether newly generated early-successional sites of industrial origin may partially compensate for this habitat loss. We studied the butterfly assemblages of 21 limestone Quarries in the region of Moravia, Czech Republic, within an important corridor of latitudinal faunal migrations, the Moravian Gate. Comparison of species abundances in the Quarries with their regional distribution allowed us to delimit a group of species, predominately xerophilous and sedentary, for which the Quarries serve as refuges. Total species richness, number of species in the group, and numbers of xerophilous and sedentary species increased toward the south and were high in young and actively operating Quarries and in Quarries that adjoined warm “steppe” grasslands. Canonical correspondence analyses suggested that habitats within the Quarries and adjoining habitats explained much higher proportions of variance than either latitude or the variables related to quarrying. However, the positive effects of southern position and active quarrying were highly significant. Both xerophilous species of the earliest-succession barrens and of later-succession scrub inhabited the Quarries, owing to the inherent heterogeneity of such sites. It follows that quarrying does not harm the priority butterflies and may be regarded as a method of habitat creation, provided that ( 1 ) the operators support habitat heterogeneity within the Quarries, ( 2 ) xerophilous sites in the vicinity are preserved and adequately managed, and ( 3 ) other phenomena of conservation importance are not adversely affected. Resumen: La declinacion a gran escala de habitats sucesionales tempranos con un manejo tradicional que resulta de la intensificacion agricola y el abandono de tierras marginales ha causado una declinacion de mariposas xerofilas en el continente europeo. Se busco establecer si los sitios en sucesion temprana recientemente generados por la actividad industrial pueden compensar en parte esta perdida de habitat. Se estudiaron conjuntos de mariposas en 21 canteras de caliza en la region de Moravia, Republica Checa, dentro de un importante corredor de migraciones faunisticas latitudinales, la Puerta Moraviana. Al comparar la abundancia de especies en las canteras con su distribucion regional pudimos identificar un grupo de especies, predominantemente xerofilas y sedentarias, para las que las canteras funcionan como refugio. La riqueza total de especies, el numero de especies en el grupo y el numero de especies xerofilas y sedentarias aumentaron hacia el sur y fueron elevados en canteras nuevas y en uso y en canteras contiguas a pastizales “estepa” templados. Los analisis de correspondencia canonica sugieren que los habitats en el interior de las canteras y en sitios adyacentes son mejores predictores de la varianza que la latitud o que las variables relacionadas con la explotacion de la cantera. Sin embargo, los efectos positivos de una ubicacion mas surena y de la explotacion activa fueron altamente significativos. Tanto las especies xerofilas de los primeros eriales de la sucesion como las del matorral de sucesion tardia habitaron las canteras, debido a la heterogeneidad inherente de tales sitios. Se desprende que la explotacion de la cantera no afecta a las mariposas prioritarias y se puede considerar un metodo de creacion de habitat siempre y cuando ( 1 ) los operadores respeten la heterogeneidad del habitat dentro de las canteras, ( 2 ) se preserven sitios xerofilos en los alrededores y se manejen adecuadamente y ( 3 ) no se afecten adversamente a otros fenomenos de importancia para la conservacion.
Pitz Carline - One of the best experts on this subject based on the ideXlab platform.
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:Description of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled.Peer reviewe
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
Presses Agronomiques de Gembloux, 2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:peer reviewedaudience: researcher, professionalDescription of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled
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Comparison of mining spoils to determine the best substrate for rehabilitating limestone Quarries by favoring native grassland species over invasive plants
'Elsevier BV', 2019Co-Authors: Pitz Carline, Mahy Grégory, Harzé Mélanie, Uyttenbroeck Roel, Monty ArnaudAbstract:peer reviewedaudience: researcher, professional, popularizationHabitats being restored in Belgian Quarries are easily invaded by non-native plant species, which can hamper the germination and development of vegetation deemed to be of high conservation value. Substrates of terraces created when mining limestone Quarries could be inhospitable to native plants. However, they can provide opportunities for establishing specific vegetation, such as dry calcareous grasslands. Applying suitable mining spoils could be a cost-effective way to provide growing substrate when restoring limestone terraces. We assessed the efficacy of using mining spoils, collected on-site, as a potential growing substrate (bedding material). We tested gravely limestone (product of on-site mining activities), limestone dust (by-product), and no addition (bare limestone bedrock) to determine which was best for favoring the growth of native, dry calcareous grassland species and discourage the growth of two non-native invasive species that commonly invade altered mining sites: Buddleja davidii Franch and Senecio inaequidens DC. In a field experiment (in two Quarries), we studied short-term (2 y) growth response of native and invasive species after sowing three seed mixtures of native grassland species, varying in functional diversity (and one no-sowing control treatment), all treatments subjected to competitive pressure exerted by invasive species. Percent cover of native and invasive species, species abundance and reproductive characteristics of the invasive species were monitored during 2-y. Native grasslands coverage was low on all substrate types, demonstrating how slowly calcareous grasslands species establish in such harsh substrate conditions. However, type of substrate did show a significant relationship with plant abundance, with limestone dust being the most beneficial for native species establishment (coverage). Although limestone dust appeared to be the best option for restoring grassland species to limestone Quarries (based on its low cost, wide availability, and potential to support native species), it was also likely to support the two invasive species. Functional diversity of the seed mixture had no consistent effect. Our study shows the importance of identifying the most appropriate substrate to both establish calcareous grasslands and resist invasive species. This approach provides insights into developing strategies to conserve biodiversity in industrial and agricultural landscapes with limestone Quarries
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Taux d'occurence des plantes invasives en carrière calcaire (Sud de la Belgique)
2016Co-Authors: Pitz Carline, Jorion Alexis, Mahy Grégory, Monty ArnaudAbstract:In Quarries, invasive plant species can slow down the installation of high conservation value vegetation. Successful management of invasive requires, at first, a quantitative assessment of invasion levels. Although European legislation has adopted an ambitious strategy against invasive species, there is still a lack of knowledge about their occurrence in Quarries. The aim of this study was to evaluate occurrence rates of invasive plant species in limestone Quarries throughout Wallonia (Southern Belgium) and identify high priority and emerging invasive plants for adapted management. During 2016 vegetation period, forty Quarries were selected by stratified sampling, using abandoned and active Quarries as strata. Within selected Quarries, two-meter wide transects were established to cross all activity sectors. Transects were divided in 10x2m plots, resulting in 2% of total surface of each quarry being surveyed. Cover and number of individuals of invasive plants species were recorded in each plot. Species considered were those of Harmonia list (67 species), the reference at the Wallonia scale. More than 30 000 plots were surveyed. Results of our recent study are presented (occurrences rates by species, mean percentage cover per site). First results indicate that dominant invasive species originate from different introduction paths: (i) planted (Robinia pseudoacacia); (ii) ornamentals (Cotoneaster horizontalis) and (iii) spontaneous colonization (Senecio inaequidens) - and follow various invasion dynamics. We propose research and management methods to be directed towards limitation of top ten frequent species (e.g. Buddleia davidii, Senecio inaequidens), and to establish a detection system for the emerging invasive plants.Peer reviewe
Jorion Alexis - One of the best experts on this subject based on the ideXlab platform.
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:Description of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled.Peer reviewe
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Plantes exotiques envahissantes dans les carrières calcaires de Belgique
Presses Agronomiques de Gembloux, 2019Co-Authors: Monty Arnaud, Jorion Alexis, Pitz Carline, Géron Charly, Mahy GrégoryAbstract:peer reviewedaudience: researcher, professionalDescription of the subject. Vegetation of high conservation value can establish in Quarries, during or after exploitation. Alien plants could hamper this process and cause additional rehabilitation costs. However, the situation of plant invasion in Quarries is largely unknown. Objectives. We aimed to assess alien plant invasion in active and abandoned Quarries, and to identify the most invaded quarry sectors. Method. We surveyed 6,692 plots in 31 Quarries in Belgium and recorded occurrence, density and cover of the 65 listed alien invasive plants in Belgium. Results. Fourteen species were recorded and 25 Quarries contained at least one species. The two most occurring species, Buddleja davidii Franch. and Senecio inaequidens DC., were more widespread in Quarries in activity. All sectors of the Quarries were affected by alien plant invasion. Conclusions. Alien plant invasion in limestone Quarries is highly variable, but significant. Considering the ecological potential of quarry sites, this issue should be better tackled
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Taux d'occurence des plantes invasives en carrière calcaire (Sud de la Belgique)
2016Co-Authors: Pitz Carline, Jorion Alexis, Mahy Grégory, Monty ArnaudAbstract:In Quarries, invasive plant species can slow down the installation of high conservation value vegetation. Successful management of invasive requires, at first, a quantitative assessment of invasion levels. Although European legislation has adopted an ambitious strategy against invasive species, there is still a lack of knowledge about their occurrence in Quarries. The aim of this study was to evaluate occurrence rates of invasive plant species in limestone Quarries throughout Wallonia (Southern Belgium) and identify high priority and emerging invasive plants for adapted management. During 2016 vegetation period, forty Quarries were selected by stratified sampling, using abandoned and active Quarries as strata. Within selected Quarries, two-meter wide transects were established to cross all activity sectors. Transects were divided in 10x2m plots, resulting in 2% of total surface of each quarry being surveyed. Cover and number of individuals of invasive plants species were recorded in each plot. Species considered were those of Harmonia list (67 species), the reference at the Wallonia scale. More than 30 000 plots were surveyed. Results of our recent study are presented (occurrences rates by species, mean percentage cover per site). First results indicate that dominant invasive species originate from different introduction paths: (i) planted (Robinia pseudoacacia); (ii) ornamentals (Cotoneaster horizontalis) and (iii) spontaneous colonization (Senecio inaequidens) - and follow various invasion dynamics. We propose research and management methods to be directed towards limitation of top ten frequent species (e.g. Buddleia davidii, Senecio inaequidens), and to establish a detection system for the emerging invasive plants.Peer reviewe
