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Savino Di Lernia - One of the best experts on this subject based on the ideXlab platform.
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Aquatic Fauna from the Takarkori rock shelter reveals the Holocene central Saharan climate and palaeohydrography.
PloS one, 2020Co-Authors: Wim Van Neer, Francesca Alhaique, Wim Wouters, Katrien Dierickx, Monica Gala, Quentin Goffette, Guido S. Mariani, Andrea Zerboni, Savino Di LerniaAbstract:The abundant Faunal remains from the Takarkori rock shelter in the Tadrart Acacus region of southwestern Libya are described. The material that covers the period between 10,200 to 4650 years cal BP illustrates the more humid environmental conditions in the Central Sahara during early and middle Holocene times. Particular attention is focussed on the Aquatic Fauna that shows marked diachronic changes related to increasing aridification. This is reflected in the decreasing amount of fish remains compared to mammals and, within the fish Fauna, by changes through time in the proportion of the species and by a reduction of fish size. The Aquatic Fauna can, in addition, be used to formulate hypotheses about the former palaeohydrographical network. This is done by considering the possible location of pre-Holocene relic populations combined with observations on the topography and palaeohydrological settings of the Central Sahara.
David L. Morgan - One of the best experts on this subject based on the ideXlab platform.
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Ecological assessment of Denmark Dam and potential relocation pools for Aquatic Fauna in the Denmark River. Report to the Water Corporation of Western Australia
2015Co-Authors: T. Ryan, Stephen J. Beatty, James J. Keleher, Mark G. Allen, David L. MorganAbstract:The current report outlines the results of an ecological survey conducted between February and April 2015 in the Denmark Dam and the Denmark River. The lowering of the water level in Denmark Dam is scheduled to occur between December 2015 and April 2016, and is planned to be a drop from full supply level of 20.7 mAHD (450 ML), initially to 18 m AHD (~100 ML) and then to the required lower range of between 16.5 mAHD (~33 ML) and 14.3 mAHD (~4 ML). Given the large reduction in water volume and Aquatic habitat, an assessment of the potential ecological impacts on the resident Aquatic Fauna was necessary. An initial survey (see Beatty et al. 2014) conducted in June 2014 revealed that there were substantial populations of native freshwater fishes in the reservoir, as well as a viable (but relatively small) population of Smooth Marron in the reservoir. It was recommended that an investigation be made into locating potential sites (i.e. refuge pools in the Denmark River) for the relocation of this Fauna during the draining of the reservoir. This would mitigate the potential for large mortalities of the Aquatic Fauna in the remnant water body that could arise through either poor water quality or increased competition and predation. The latter study also recommended that the reservoir be re‐surveyed at a time that better matched the planned draindown period to provide additional and more comparable data on the abundances of the different Aquatic Fauna that is most likely to be encountered at the time of draining.
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Aquatic Fauna of Southampton Pool, Blackwood River: an assessment of the potential impacts during construction of a subterranean pipeline. Report to the Water Corporation of Western Australia
2013Co-Authors: Stephen J. Beatty, David L. Morgan, James J. Keleher, Mark G. Allen, K. StrehlowAbstract:An Aquatic Fauna study was required to gather baseline information on the resident Aquatic Fauna within the construction site and also the ~2.2 km permanent pool downstream of the site to assess the potential likely risk to those Fauna, and finally to identify measures that could be taken to mitigate those risks. The aims of this study were to: 1) Determine the Aquatic Fauna (freshwater fish, crayfish, mussels and macroinvertebrates) within and adjacent to the proposed construction site. 2) Evaluate the conservation significance of those Fauna including identifying sensitive or threatened species. 3) Determine the physiochemical characteristics of the pool downstream of the proposed construction site (including depth profiling the entire pool, and profiling the temperature, conductivity, dissolved oxygen, pH along with collecting baseline turbidity). 4) Use the data from the survey along with information on the proposed construction activities supplied in the brief and subsequent communication with Water Corporation and McLean Consultants, undertake a simplified risk assessment (i.e. risk ID, analysis of likelihood and consequence, evaluation, and recommend treatment to mitigate risks) to assess the possible impacts of those activities on the resident Fauna and identify measures to mitigate the identified risks.
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Supplementary survey of Aquatic Fauna of Southampton Pool, Blackwood River: an assessment of the potential impacts during construction of a subterranean pipeline. Report to the Water Corporation of Western Australia
2013Co-Authors: Stephen J. Beatty, David L. Morgan, James J. Keleher, Mark G. Allen, K. StrehlowAbstract:This report details the supplementary Aquatic Fauna survey conducted in Southampton Pool (Blackwood River) in November 2013. The study replicates the initial survey conducted by the authors for the Water Corporation that determined the Aquatic Fauna within the pool, identified likely risks that the proposed construction of a subterranean pipeline at the upstream margin of the pool may have on these Fauna, and recommended strategies and actions that could be taken to minimize those potential impacts identified. The need for the current survey arose due to a major bush fire that burnt the site in February (12‐15th) 2013 that may have caused changes to the prevailing Fauna thereby probably rendering the initial survey as inappropriate to assess risks to the Fauna. The initial comprehensive Aquatic Faunal survey (Appendix 1) specifically recommended repeating that survey given the confounding influence the bush fire may have had on the Aquatic Fauna. Therefore, the current study aimed to determine the prevailing Fauna in the pool prior to the construction phase of the pipeline project being conducted. It then aimed to assess whether notable changes in the Fauna had occurred compared to the initial survey. Finally, it aimed to review and potentially refine our previous recommendations to ensure they were still appropriate for the management of the Aquatic Fauna of Southampton Pool prior to, and during, pipeline construction to mitigate its potential ecological impacts.
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Risk assessment of Record Brook interbasin water transfer scheme to the Aquatic Fauna of the Donnelly and Warren Rivers
2009Co-Authors: M. De Graaf, David L. Morgan, Stephen J. Beatty, C.w. HughAbstract:This report describes the fishes and freshwater crayfishes of the Donnelly and Warren River catchments and provides a risk assessment to these Fauna of the proposed extraction of water from Record Brook (tributary of the Donnelly River) and subsequent transfer to Scabby Gully Dam (Warren River catchment). The proposed location of the structure in Record Brook is at the gauging station ~1 km upstream from the confluence with the Donnelly River. The project aims to divert peak flows in the winter and spring flow period, transferring around 500 ML each year. The size and shape of the interception structure is yet to be determined, but are likely to incorporate a concrete weir < 5m high and a reservoir. A total of six sites in Record Brook, Donnelly River and Scabby Gully Dam were sampled and these data were collated with additional historical information on the Aquatic Fauna of both catchments. An overview of fishes and freshwater crayfishes in the Donnelly River is summarised in Morgan & Beatty (2006), the authors recorded a high diversity of native freshwater species [Salamanderfish, Western Minnow, Black-stripe Minnow, Western Mud Minnow, Nightfish, Western Pygmy Perch, Balston’s Pygmy Perch, Freshwater Cobbler, (metamorphosed) ammocoetes of the Pouched Lamprey, Marron, (Restricted) Gilgie, Koonac, Freshwater Shrimp] as well as several estuarine [Western Hardyhead, Blue-spot Goby, South-west Goby] and non-native species [Mosquitofish, Redfin Perch, Rainbow Trout and Brown Trout]. The Donnelly River system is one of only two in south-western Australia that houses all of the endemic fishes of the region. The Fauna of Record Brook contrasted that within the main channel sites of the Donnelly River. Within Record Brook, the Fauna was dominated by the Pouched Lamprey, Koonac and Rainbow Trout, with the occasional Marron, Western Minnow and Western Pygmy Perch recorded. Within the Donnelly River main channel sites, the captures included Nightfish, Blue-spot Gobies, the Restricted Gilgie, Freshwater Shrimp and introduced Eastern Mosquitofish.The ichthyoFauna of the Warren River consists of 14 fish species and is similar to the Donnelly River with the notable absence of Balston’s Pygmy Perch and Salamanderfish. However, in Scabby Gully dam only Marron and Redfin Perch were observed. The risks of transfer of parasites and disease, feral/native fish or crayfish from Record Brook to Scabby Gully Dam are low. Threats to fish and freshwater crayfish in Record Brook include changes to water quality (altered flow, altered habitat and/or changes in temperature, oxygen, salinity) and requires ongoing monitoring should the project be implemented. The highest threat to fish and freshwater fish would be the barrier to fish movement by construction of the proposed dam. The construction of a fishway at the proposed dam would reduce some of the negative impacts to fish migration but would also require ongoing monitoring. No specially protected fish and/or crayfish species have been recorded in Record Brook. However, Record Brook acts as an important nursery area for the Pouched Lamprey and this species is listed as a Priority Species (Priority 1) by the Department of Environment and Conservation. The contents of this report are intended to inform of future management options and do not constitute, or replace any assessment or approval processes that may be required in accordance with the Environmental Protection Act 1986 and/or Environmental Protection and Biodiversity Conservation Act 1999.
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Aquatic Fauna of the Warren bioregion, south-west Western Australia: Does reservation guarantee preservation?
1996Co-Authors: K.m. Trayler, Jennifer Ann Davis, Pierre Horwitz, David L. MorganAbstract:The Warren Bioregion, in the extreme south-west of Western Australia, has a unique assemblage of Aquatic invertebrates, fish and amphibians. Current literature indicates that 192 fully described species have been collected, of which 10 invertebrate, 1 fish and 6 frog species could be considered locally endemic. We estimate that secure nature reserves (A-Class and National Parks) in the Warren Bioregion provide a refuge for 86% of the Aquatic Faunal elements. Reservation alone, however, may not be sufficient to protect certain of the Aquatic Fauna. Adverse impacts occurring within catchments, including erosion and deposition of sediment, salinization, fire, land clearing, the presence of dams and the introduction of exotic fish, may adversely affect the Aquatic Fauna within a reserve. Management of protected habitats must ensure that only anthropogenic activities which are sympathetic to the long term persistence of all elements of the biota occur within, and adjacent to, the reserve systems
Stephen J. Beatty - One of the best experts on this subject based on the ideXlab platform.
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Ecological assessment of Denmark Dam and potential relocation pools for Aquatic Fauna in the Denmark River. Report to the Water Corporation of Western Australia
2015Co-Authors: T. Ryan, Stephen J. Beatty, James J. Keleher, Mark G. Allen, David L. MorganAbstract:The current report outlines the results of an ecological survey conducted between February and April 2015 in the Denmark Dam and the Denmark River. The lowering of the water level in Denmark Dam is scheduled to occur between December 2015 and April 2016, and is planned to be a drop from full supply level of 20.7 mAHD (450 ML), initially to 18 m AHD (~100 ML) and then to the required lower range of between 16.5 mAHD (~33 ML) and 14.3 mAHD (~4 ML). Given the large reduction in water volume and Aquatic habitat, an assessment of the potential ecological impacts on the resident Aquatic Fauna was necessary. An initial survey (see Beatty et al. 2014) conducted in June 2014 revealed that there were substantial populations of native freshwater fishes in the reservoir, as well as a viable (but relatively small) population of Smooth Marron in the reservoir. It was recommended that an investigation be made into locating potential sites (i.e. refuge pools in the Denmark River) for the relocation of this Fauna during the draining of the reservoir. This would mitigate the potential for large mortalities of the Aquatic Fauna in the remnant water body that could arise through either poor water quality or increased competition and predation. The latter study also recommended that the reservoir be re‐surveyed at a time that better matched the planned draindown period to provide additional and more comparable data on the abundances of the different Aquatic Fauna that is most likely to be encountered at the time of draining.
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Aquatic Fauna of Schwenke’s Dam: a rehabilitated mine lake in Greenbushes
2014Co-Authors: James J. Keleher, Stephen J. Beatty, Mark G. AllenAbstract:The freshwater fishes of south‐western Australia are highly endemic (>82%) to the region. Most species have been severely impacted by habitat and water quality decline and introduced species. Freshwater fish and crayfish play important roles in Aquatic ecosystems and are useful indicators of the ecological health. In designing and implementing robust ecological management and monitoring programs of Aquatic ecosystems, it is important to have a sound understanding of the prevailing Aquatic Fauna; particularly the resident fish communities. Schwenke’s Dam is a historical mining pit located in Greenbushes, ~75km south of Bunbury, Western Australia. The Bittern and Waterbird Biodiversity Enhancement Project aims to create a wetland haven to attract critically endangered waterbirds to inhabit the site. Fishes are an important food source for Bitterns and other waterbirds and would play an important role in attracting them to and sustaining them at a waterbody.
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Supplementary survey of Aquatic Fauna of Southampton Pool, Blackwood River: an assessment of the potential impacts during construction of a subterranean pipeline. Report to the Water Corporation of Western Australia
2013Co-Authors: Stephen J. Beatty, David L. Morgan, James J. Keleher, Mark G. Allen, K. StrehlowAbstract:This report details the supplementary Aquatic Fauna survey conducted in Southampton Pool (Blackwood River) in November 2013. The study replicates the initial survey conducted by the authors for the Water Corporation that determined the Aquatic Fauna within the pool, identified likely risks that the proposed construction of a subterranean pipeline at the upstream margin of the pool may have on these Fauna, and recommended strategies and actions that could be taken to minimize those potential impacts identified. The need for the current survey arose due to a major bush fire that burnt the site in February (12‐15th) 2013 that may have caused changes to the prevailing Fauna thereby probably rendering the initial survey as inappropriate to assess risks to the Fauna. The initial comprehensive Aquatic Faunal survey (Appendix 1) specifically recommended repeating that survey given the confounding influence the bush fire may have had on the Aquatic Fauna. Therefore, the current study aimed to determine the prevailing Fauna in the pool prior to the construction phase of the pipeline project being conducted. It then aimed to assess whether notable changes in the Fauna had occurred compared to the initial survey. Finally, it aimed to review and potentially refine our previous recommendations to ensure they were still appropriate for the management of the Aquatic Fauna of Southampton Pool prior to, and during, pipeline construction to mitigate its potential ecological impacts.
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Aquatic Fauna of Southampton Pool, Blackwood River: an assessment of the potential impacts during construction of a subterranean pipeline. Report to the Water Corporation of Western Australia
2013Co-Authors: Stephen J. Beatty, David L. Morgan, James J. Keleher, Mark G. Allen, K. StrehlowAbstract:An Aquatic Fauna study was required to gather baseline information on the resident Aquatic Fauna within the construction site and also the ~2.2 km permanent pool downstream of the site to assess the potential likely risk to those Fauna, and finally to identify measures that could be taken to mitigate those risks. The aims of this study were to: 1) Determine the Aquatic Fauna (freshwater fish, crayfish, mussels and macroinvertebrates) within and adjacent to the proposed construction site. 2) Evaluate the conservation significance of those Fauna including identifying sensitive or threatened species. 3) Determine the physiochemical characteristics of the pool downstream of the proposed construction site (including depth profiling the entire pool, and profiling the temperature, conductivity, dissolved oxygen, pH along with collecting baseline turbidity). 4) Use the data from the survey along with information on the proposed construction activities supplied in the brief and subsequent communication with Water Corporation and McLean Consultants, undertake a simplified risk assessment (i.e. risk ID, analysis of likelihood and consequence, evaluation, and recommend treatment to mitigate risks) to assess the possible impacts of those activities on the resident Fauna and identify measures to mitigate the identified risks.
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Risk assessment of Record Brook interbasin water transfer scheme to the Aquatic Fauna of the Donnelly and Warren Rivers
2009Co-Authors: M. De Graaf, David L. Morgan, Stephen J. Beatty, C.w. HughAbstract:This report describes the fishes and freshwater crayfishes of the Donnelly and Warren River catchments and provides a risk assessment to these Fauna of the proposed extraction of water from Record Brook (tributary of the Donnelly River) and subsequent transfer to Scabby Gully Dam (Warren River catchment). The proposed location of the structure in Record Brook is at the gauging station ~1 km upstream from the confluence with the Donnelly River. The project aims to divert peak flows in the winter and spring flow period, transferring around 500 ML each year. The size and shape of the interception structure is yet to be determined, but are likely to incorporate a concrete weir < 5m high and a reservoir. A total of six sites in Record Brook, Donnelly River and Scabby Gully Dam were sampled and these data were collated with additional historical information on the Aquatic Fauna of both catchments. An overview of fishes and freshwater crayfishes in the Donnelly River is summarised in Morgan & Beatty (2006), the authors recorded a high diversity of native freshwater species [Salamanderfish, Western Minnow, Black-stripe Minnow, Western Mud Minnow, Nightfish, Western Pygmy Perch, Balston’s Pygmy Perch, Freshwater Cobbler, (metamorphosed) ammocoetes of the Pouched Lamprey, Marron, (Restricted) Gilgie, Koonac, Freshwater Shrimp] as well as several estuarine [Western Hardyhead, Blue-spot Goby, South-west Goby] and non-native species [Mosquitofish, Redfin Perch, Rainbow Trout and Brown Trout]. The Donnelly River system is one of only two in south-western Australia that houses all of the endemic fishes of the region. The Fauna of Record Brook contrasted that within the main channel sites of the Donnelly River. Within Record Brook, the Fauna was dominated by the Pouched Lamprey, Koonac and Rainbow Trout, with the occasional Marron, Western Minnow and Western Pygmy Perch recorded. Within the Donnelly River main channel sites, the captures included Nightfish, Blue-spot Gobies, the Restricted Gilgie, Freshwater Shrimp and introduced Eastern Mosquitofish.The ichthyoFauna of the Warren River consists of 14 fish species and is similar to the Donnelly River with the notable absence of Balston’s Pygmy Perch and Salamanderfish. However, in Scabby Gully dam only Marron and Redfin Perch were observed. The risks of transfer of parasites and disease, feral/native fish or crayfish from Record Brook to Scabby Gully Dam are low. Threats to fish and freshwater crayfish in Record Brook include changes to water quality (altered flow, altered habitat and/or changes in temperature, oxygen, salinity) and requires ongoing monitoring should the project be implemented. The highest threat to fish and freshwater fish would be the barrier to fish movement by construction of the proposed dam. The construction of a fishway at the proposed dam would reduce some of the negative impacts to fish migration but would also require ongoing monitoring. No specially protected fish and/or crayfish species have been recorded in Record Brook. However, Record Brook acts as an important nursery area for the Pouched Lamprey and this species is listed as a Priority Species (Priority 1) by the Department of Environment and Conservation. The contents of this report are intended to inform of future management options and do not constitute, or replace any assessment or approval processes that may be required in accordance with the Environmental Protection Act 1986 and/or Environmental Protection and Biodiversity Conservation Act 1999.
Wim Van Neer - One of the best experts on this subject based on the ideXlab platform.
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Aquatic Fauna from the Takarkori rock shelter reveals the Holocene central Saharan climate and palaeohydrography.
PloS one, 2020Co-Authors: Wim Van Neer, Francesca Alhaique, Wim Wouters, Katrien Dierickx, Monica Gala, Quentin Goffette, Guido S. Mariani, Andrea Zerboni, Savino Di LerniaAbstract:The abundant Faunal remains from the Takarkori rock shelter in the Tadrart Acacus region of southwestern Libya are described. The material that covers the period between 10,200 to 4650 years cal BP illustrates the more humid environmental conditions in the Central Sahara during early and middle Holocene times. Particular attention is focussed on the Aquatic Fauna that shows marked diachronic changes related to increasing aridification. This is reflected in the decreasing amount of fish remains compared to mammals and, within the fish Fauna, by changes through time in the proportion of the species and by a reduction of fish size. The Aquatic Fauna can, in addition, be used to formulate hypotheses about the former palaeohydrographical network. This is done by considering the possible location of pre-Holocene relic populations combined with observations on the topography and palaeohydrological settings of the Central Sahara.
K. Strehlow - One of the best experts on this subject based on the ideXlab platform.
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Supplementary survey of Aquatic Fauna of Southampton Pool, Blackwood River: an assessment of the potential impacts during construction of a subterranean pipeline. Report to the Water Corporation of Western Australia
2013Co-Authors: Stephen J. Beatty, David L. Morgan, James J. Keleher, Mark G. Allen, K. StrehlowAbstract:This report details the supplementary Aquatic Fauna survey conducted in Southampton Pool (Blackwood River) in November 2013. The study replicates the initial survey conducted by the authors for the Water Corporation that determined the Aquatic Fauna within the pool, identified likely risks that the proposed construction of a subterranean pipeline at the upstream margin of the pool may have on these Fauna, and recommended strategies and actions that could be taken to minimize those potential impacts identified. The need for the current survey arose due to a major bush fire that burnt the site in February (12‐15th) 2013 that may have caused changes to the prevailing Fauna thereby probably rendering the initial survey as inappropriate to assess risks to the Fauna. The initial comprehensive Aquatic Faunal survey (Appendix 1) specifically recommended repeating that survey given the confounding influence the bush fire may have had on the Aquatic Fauna. Therefore, the current study aimed to determine the prevailing Fauna in the pool prior to the construction phase of the pipeline project being conducted. It then aimed to assess whether notable changes in the Fauna had occurred compared to the initial survey. Finally, it aimed to review and potentially refine our previous recommendations to ensure they were still appropriate for the management of the Aquatic Fauna of Southampton Pool prior to, and during, pipeline construction to mitigate its potential ecological impacts.
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Aquatic Fauna of Southampton Pool, Blackwood River: an assessment of the potential impacts during construction of a subterranean pipeline. Report to the Water Corporation of Western Australia
2013Co-Authors: Stephen J. Beatty, David L. Morgan, James J. Keleher, Mark G. Allen, K. StrehlowAbstract:An Aquatic Fauna study was required to gather baseline information on the resident Aquatic Fauna within the construction site and also the ~2.2 km permanent pool downstream of the site to assess the potential likely risk to those Fauna, and finally to identify measures that could be taken to mitigate those risks. The aims of this study were to: 1) Determine the Aquatic Fauna (freshwater fish, crayfish, mussels and macroinvertebrates) within and adjacent to the proposed construction site. 2) Evaluate the conservation significance of those Fauna including identifying sensitive or threatened species. 3) Determine the physiochemical characteristics of the pool downstream of the proposed construction site (including depth profiling the entire pool, and profiling the temperature, conductivity, dissolved oxygen, pH along with collecting baseline turbidity). 4) Use the data from the survey along with information on the proposed construction activities supplied in the brief and subsequent communication with Water Corporation and McLean Consultants, undertake a simplified risk assessment (i.e. risk ID, analysis of likelihood and consequence, evaluation, and recommend treatment to mitigate risks) to assess the possible impacts of those activities on the resident Fauna and identify measures to mitigate the identified risks.