The Experts below are selected from a list of 216 Experts worldwide ranked by ideXlab platform
Richard M. Morris - One of the best experts on this subject based on the ideXlab platform.
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An earthworm cultivation and soil inoculation technique for land restoration
Ecological Engineering, 2000Co-Authors: Kebin R. Butt, James Frederickson, Richard M. MorrisAbstract:Abstract The introduction of selected earthworms into degraded or newly restored land is known to promote soil improvement. However, to collect and introduce the large numbers required for use in land restoration can be costly and time consuming. To overcome these problems, an Earthworm Inoculation Unit (EIU) technique combines cultivation of selected earthworms in soil-based units with an effective method of direct soil introduction. Cultivation of a particular deep-Burrowing Species was achieved through optimizing temperature, nutrition and population density. At soil inoculation, after 3 months, each 2-l EIU contained all three life stages - adults, cocoons and hatchlings - providing maximum opportunity for successful colonization. Compared with a conventional method of inoculation, the EIU technique gave rise to enhanced survivorship in a compacted clay soil during the first year after inoculation. Earthworm inoculation should become an integral component of sustainable land restoration practice and the EIU technique provides the most effective means of ensuring long-term earthworm colonization, particularly in hostile soil environments.
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The earthworm inoculation unit technique: an integrated system for cultivation and soil-inoculation of earthworms
Soil Biology & Biochemistry, 1997Co-Authors: Kebin R. Butt, James Frederickson, Richard M. MorrisAbstract:Abstract The introduction of earthworms into degraded or newly restored land is known to promote soil improvement. Obtaining the most appropriate Species in the large numbers required can be costly and time consuming using traditional techniques. Research and development of a novel approach, the Earthworm Inoculation Unit (EIU) technique, may help to overcome this. This technique combines cultivation of selected earthworms in small soil-based units, with an effective method of direct soil introduction. Successful cultivation of deep Burrowing Species, e.g. Lumbricus terrestris L. and Aporrectodea longa (Ude), and shallow working Species, e.g. Allolobophora chlorotica (Savigny), has been achieved by optimizing environmental factors. Accelerated rates of reproduction compared with field data have been recorded. At soil-inoculation, each EIU was found to contain all three earthworm life stages, adults, cocoons and hatchlings, promoting maximum opportunity for successful colonisation. Reselts from field trials suggest, that for A. longa , the EIU technique can enhance survivorship in compacted clay soils compared with a more conventional inoculation method. Earthworm inoculation, where appropriate, should become an integral component of sustainable land restoration practice. In hostile soils, often associated with reclaimed land, the EIU technique may provide a means of ensuring long term survival for earthworm populations.
Kebin R. Butt - One of the best experts on this subject based on the ideXlab platform.
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An earthworm cultivation and soil inoculation technique for land restoration
Ecological Engineering, 2000Co-Authors: Kebin R. Butt, James Frederickson, Richard M. MorrisAbstract:Abstract The introduction of selected earthworms into degraded or newly restored land is known to promote soil improvement. However, to collect and introduce the large numbers required for use in land restoration can be costly and time consuming. To overcome these problems, an Earthworm Inoculation Unit (EIU) technique combines cultivation of selected earthworms in soil-based units with an effective method of direct soil introduction. Cultivation of a particular deep-Burrowing Species was achieved through optimizing temperature, nutrition and population density. At soil inoculation, after 3 months, each 2-l EIU contained all three life stages - adults, cocoons and hatchlings - providing maximum opportunity for successful colonization. Compared with a conventional method of inoculation, the EIU technique gave rise to enhanced survivorship in a compacted clay soil during the first year after inoculation. Earthworm inoculation should become an integral component of sustainable land restoration practice and the EIU technique provides the most effective means of ensuring long-term earthworm colonization, particularly in hostile soil environments.
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The earthworm inoculation unit technique: an integrated system for cultivation and soil-inoculation of earthworms
Soil Biology & Biochemistry, 1997Co-Authors: Kebin R. Butt, James Frederickson, Richard M. MorrisAbstract:Abstract The introduction of earthworms into degraded or newly restored land is known to promote soil improvement. Obtaining the most appropriate Species in the large numbers required can be costly and time consuming using traditional techniques. Research and development of a novel approach, the Earthworm Inoculation Unit (EIU) technique, may help to overcome this. This technique combines cultivation of selected earthworms in small soil-based units, with an effective method of direct soil introduction. Successful cultivation of deep Burrowing Species, e.g. Lumbricus terrestris L. and Aporrectodea longa (Ude), and shallow working Species, e.g. Allolobophora chlorotica (Savigny), has been achieved by optimizing environmental factors. Accelerated rates of reproduction compared with field data have been recorded. At soil-inoculation, each EIU was found to contain all three earthworm life stages, adults, cocoons and hatchlings, promoting maximum opportunity for successful colonisation. Reselts from field trials suggest, that for A. longa , the EIU technique can enhance survivorship in compacted clay soils compared with a more conventional inoculation method. Earthworm inoculation, where appropriate, should become an integral component of sustainable land restoration practice. In hostile soils, often associated with reclaimed land, the EIU technique may provide a means of ensuring long term survival for earthworm populations.
James Frederickson - One of the best experts on this subject based on the ideXlab platform.
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An earthworm cultivation and soil inoculation technique for land restoration
Ecological Engineering, 2000Co-Authors: Kebin R. Butt, James Frederickson, Richard M. MorrisAbstract:Abstract The introduction of selected earthworms into degraded or newly restored land is known to promote soil improvement. However, to collect and introduce the large numbers required for use in land restoration can be costly and time consuming. To overcome these problems, an Earthworm Inoculation Unit (EIU) technique combines cultivation of selected earthworms in soil-based units with an effective method of direct soil introduction. Cultivation of a particular deep-Burrowing Species was achieved through optimizing temperature, nutrition and population density. At soil inoculation, after 3 months, each 2-l EIU contained all three life stages - adults, cocoons and hatchlings - providing maximum opportunity for successful colonization. Compared with a conventional method of inoculation, the EIU technique gave rise to enhanced survivorship in a compacted clay soil during the first year after inoculation. Earthworm inoculation should become an integral component of sustainable land restoration practice and the EIU technique provides the most effective means of ensuring long-term earthworm colonization, particularly in hostile soil environments.
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The earthworm inoculation unit technique: an integrated system for cultivation and soil-inoculation of earthworms
Soil Biology & Biochemistry, 1997Co-Authors: Kebin R. Butt, James Frederickson, Richard M. MorrisAbstract:Abstract The introduction of earthworms into degraded or newly restored land is known to promote soil improvement. Obtaining the most appropriate Species in the large numbers required can be costly and time consuming using traditional techniques. Research and development of a novel approach, the Earthworm Inoculation Unit (EIU) technique, may help to overcome this. This technique combines cultivation of selected earthworms in small soil-based units, with an effective method of direct soil introduction. Successful cultivation of deep Burrowing Species, e.g. Lumbricus terrestris L. and Aporrectodea longa (Ude), and shallow working Species, e.g. Allolobophora chlorotica (Savigny), has been achieved by optimizing environmental factors. Accelerated rates of reproduction compared with field data have been recorded. At soil-inoculation, each EIU was found to contain all three earthworm life stages, adults, cocoons and hatchlings, promoting maximum opportunity for successful colonisation. Reselts from field trials suggest, that for A. longa , the EIU technique can enhance survivorship in compacted clay soils compared with a more conventional inoculation method. Earthworm inoculation, where appropriate, should become an integral component of sustainable land restoration practice. In hostile soils, often associated with reclaimed land, the EIU technique may provide a means of ensuring long term survival for earthworm populations.
F. Xavier Niell - One of the best experts on this subject based on the ideXlab platform.
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Burrowing beetles of the genus Bledius (Staphylinidae) as agents of bioturbation in the emergent areas and shores of an athalassic inland lake (Fuente de Piedra, southern of Spain)
Hydrobiologia, 1991Co-Authors: Carlos M. García, F. Xavier NiellAbstract:Bledius (Elbidus) bicornis (Germ.) and B. (Eucerotobledius) furcatus (Oliv.) (Coleoptera: Staphylinidae) are the most important Burrowing Species in the emergent areas and shores in the athalassic lake of Fuente de Piedra (Málaga, S. of Spain). A first estimate of the importance of these organisms in this system is presented. These insects kick out sediment during their Burrowing activity, which accumulates on the surface near the burrows as tumuli which can be easily eroded. The lake perimeter (17 km) is densely colonized (usual densities from 1700 to 2500 ind m^−2). The amount of granulated material that can be potentially kicked out was 46.22 g dry wt m^−2 day^−1. At the same time, the material that constitutes the tumuli shows different characteristics from the compact ground below the surface. Thus, it is relatively enriched with organic matter (6.15 g per square meter), soluble phosphate (406.5 µg m^−2) and ammonium (4856 µg m^−2), whereas it lacks nitrate. Results of a transect from uninhabited areas to zones of maximum population density also show a similarity between the higher ground level of ammonium and phosphate concentrations and population density.
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Burrowing beetles of the genus Bledius (Staphylinidae) as agents of bioturbation in the emergent areas and shores of an athalassic inland lake (Fuente de Piedra, southern of Spain)
Hydrobiologia, 1991Co-Authors: Carlos M. García, F. Xavier NiellAbstract:Bledius (Elbidus) bicornis (Germ.) and B. (Eucerotobledius) furcatus (Oliv.) (Coleoptera: Staphylinidae) are the most important Burrowing Species in the emergent areas and shores in the athalassic lake of Fuente de Piedra (Malaga, S. of Spain).
Erich H. Rudolph - One of the best experts on this subject based on the ideXlab platform.
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On Virilastacus Species (Crustacea, Decapoda, Parastacidae)
2017Co-Authors: Erich H. RudolphAbstract:ABSTRACT. The genus Virilastacus was created by Hobbs (1991) to accommodate Parastacus araucanius Faxon1914. This genus would subsequently be confirmed by Crandall et al. (2000), using molecular phylogenetic techniques. At present, Virilastacus groups together four Burrowing Species, three of which were described at the beginning of the XXI century and biological knowledge about these Species is mainly limited to taxonomic and distributional aspects. This review compiles information published on these Species, together with other data available to the author, in order to update the current state of biological knowledge and, in turn, to promote their conservation. An upgraded diagnosis of the genus is provided, together with information related to each Species with regard to: distinctive morphological traits, geographic distribution, habitat, burrow morphology, Burrowing behaviour, body size, sexual system and state of conservation. Finally, aspects related to morphological adaptations to their Burrowing life style, phylogenetic affinities, main threats to conservation and lack of legislation to ensure the protection of these Species, are discussed.
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Current state of knowledge on Virilastacus Species (Crustacea, Decapoda, Parastacidae)
Latin American Journal of Aquatic Research, 2015Co-Authors: Erich H. RudolphAbstract:The genus Virilastacus was created in 1991 to accommodate Parastacus araucanius Faxon, 1914. At present, Virilastacus comprises four Burrowing Species, three of which were described at the beginning of the XXI century, and biological knowledge about these Species is mainly limited to taxonomic and distributional aspects. This review compiles published information about these Species, together with other data available to the author in order to update the current state of biological knowledge and, in turn, to promote the conservation of these Species. An upgraded diagnosis of the genus Virilastacus is provided, together with information related to each Species with regard to: distinctive morphological traits, geographic distribution, habitat, burrow morphology, Burrowing behavior, body size, sexual system, and state of conservation. Some aspects related to morphological adaptations to their Burrowing life style, phylogenetic affinities and main threats to conservation are also discussed. It is concluded that biological knowledge about these four Species is scarce and fragmentary; furthermore, they are currently under threat as a result of anthropogenic activities that are degrading and fragmenting their habitat.
