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The Bert's predaceous diving beetle (''Sanfilippodytes bertae'') is listed as an endangered species of beetle currently residing in southern Alberta Canada, and is protected under the federal Species at Risk Act.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 It has no current sub species, and is part of the Sanfilippodytes Bertae species.〔Larson, D.J., Y. Alarie, and R.E. Roughley. (2000). Predaceous Diving Beetles Coleoptera: Dytiscidae of the Nearctic Region, with emphasis on the fauna of Canada and Alaska. NRC Research Press, Ottawa. /doi/book/10.1139/9780660179674〕 The species belongs to the taxonomy of arthropods,〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 kingdom animalia, class insect, order coleoptera, superfamily dytiscoidea and family dytiscidae.〔Larson, D.J., Y. Alarie, and R.E. Roughley. (2000). Predaceous Diving Beetles Coleoptera: Dytiscidae of the Nearctic Region, with emphasis on the fauna of Canada and Alaska. NRC Research Press, Ottawa. /doi/book/10.1139/9780660179674〕 == Habitat and Distribution == Globally, ''Sanfilippodytes bertae'' currently resides in the only habitat it is known to survive, Southern Alberta, Canada, and its location has remained unaltered since the discovery of the beetle’s habitat in 1984.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 Since 2007, the last time the beetle’s additional localities were explored, no new habitats were discovered.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 Its historic distribution is located along the north banks of the Oldman River, east of Fort MacLeod.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 There is no recovery plan that is in place to protect the species. The only other region where the beetle has been spotted is called the “Oasis”.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 This area is located in Head-Smashed-in Buffalo Jump, in southern Alberta, is in close proximity to the Oldman River, and has the same ecosystem present to support the life of the species’ specific needs.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 The Oasis however, is slightly different in that it is an area that is five to eight metres below the landscape of low vegetation and hills.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 The area faces Highway 785 and contains a spring that exits a rock crevice and drains into a narrow channel that meets with a stagnant channel surrounded by soil, wet moss, algae, and trees.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 This area is distinguished by low vegetation, and a cliff that drops off below the normal landscape of smooth hills, which are prone to high winds, mosses, and algae.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 This strict cut off location is the main reason why the beetle is endangered, as it is geographically restricted, and as a whole, the area of occupancy is only 2 m2.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 There have been no efforts for the salvation of the beetle’s population. Since the Predaceous Diving Beetle is limited to springs and seepage areas, the main problem with the lack of recovery for ''Sanfilippodytes bertae'' is habitat loss.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 A lowering water level in the Oldman River Basin as well as aggregation of livestock, agricultural irrigation, rapid growth in human population, and thus a higher demand for water, would dry up the habitat as well.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 In addition, cattle’s trampling and defecating, and ranch vehicles would damage the outlets of springs and seepages which would create muddier conditions, destroying the habitat.〔Larson, D.J., Y. Alarie, and R.E. Roughley. (2000). Predaceous Diving Beetles Coleoptera: Dytiscidae of the Nearctic Region, with emphasis on the fauna of Canada and Alaska. NRC Research Press, Ottawa. /doi/book/10.1139/9780660179674〕 The general trend for the Predacious Diving Beetle is an area with springs, seepage areas, and fine grained sands, algae, and mosses, which would signify an undisturbed area. Since the beetle requires a very specific habitat, threats to the species are indirect, as destruction of their habitat would leave the beetle with no place to reside.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 A lowering water level in the Oldman River Basin as well as aggregation of livestock, agricultural irrigation, rapid growth in human population, and thus a higher demand for water, would dry up the habitat.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 In addition, cattle’s trampling and defecating, and ranch vehicles would damage the outlets of springs and seepages which would create muddier conditions, destroying the habitat.〔Larson, D.J., Y. Alarie, and R.E. Roughley. (2000). Predaceous Diving Beetles Coleoptera: Dytiscidae of the Nearctic Region, with emphasis on the fauna of Canada and Alaska. NRC Research Press, Ottawa. /doi/book/10.1139/9780660179674〕 The reason scientists predict why Bert’s Predacious Diving Beetle has such a small population in an isolated and specific habitat is because of the size of the beetle, and the windy conditions that would inhibit long distance travelling.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 Currently, there is no effort to protect the beetle itself, as it is not globally or regionally listed.〔COSEWIC Assessment and Status Report on the Bert’s Predaceous Diving Beetle Sanfilippodytes bertae in Canada. (2009, January 1). Retrieved January 25, 2015, from http://www.registrelep-sararegistry.gc.ca/default.asp?lang=En&n=4CA044A4-1#_Toc257887365〕 The same goes for the beetle’s niche habitat, which makes it difficult to predict the fate of Sanfilippodytes Bertae’s survival. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sanfilippodytes bertae」の詳細全文を読む スポンサード リンク
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