Mammals and Reptiles of the Gorgon Gas Development EIS/ERMP - Technical appendix C2

Mammals - Barrow Island is recognised as an important refuge for native mammal species that have either declined in numbers or become extinct on the mainland. The island supports 13 species of resident terrestrial mammals, with a further two species of bat recorded as vagrants to the island.All of the terrestrial mammal species of Barrow Island, except bats, were either trapped or observed within the proposed Development area. Bats are likely to forage in the Development area, but have not been recorded.All of these species are widespread on the island, with the exception of the water-rat which is confined to coastal areas. There are no distinctive habitat features within the proposed Development area that are likely to support unusually high population densities of any mammal species.The small black-flanked rock-wallaby population does not occur within the proposed Development area.Reptiles and Amphibians - The reptile and amphibian assemblage on Barrow Island is depauperate in comparison with the herpetofauna of the adjacent mainland. Barrow Island is home to 43 species of reptiles comprising dragons, legless lizards, geckoes, skinks, blind snakes, monitors, snakes and one frog species.Most of these species, or their habitats, are widely distributed on Barrow Island. Twenty-seven species, or more than half of the terrestrial reptiles known to occur on Barrow Island, have been recorded in the vicinity of the Development area.The reptile assemblage along the proposed domestic gas pipeline route on the mainland is expected to be degraded by feral predators and habitat alteration through livestock grazing. The EPBC Act-listed Pilbara olive python is restricted to rocky habitats in the Pilbara and is not expected to occur in the sandy habitats along the domestic gas pipeline corridor.哺乳动物类群——巴罗岛被认定为本土哺乳动物物种的重要庇护所，这些物种在大陆上要么种群数量衰退，要么已区域性灭绝。该岛栖息有13种定居性陆生哺乳动物，另有2种蝙蝠被记录为该岛的偶见流浪物种。除蝙蝠外，巴罗岛所有陆生哺乳动物物种均在拟议开发区域内被诱捕或实地观测到。蝙蝠大概率会在该开发区域内觅食，但目前尚未有相关记录。上述所有物种在全岛范围内广泛分布，唯有水鼠（water-rat）局限于沿岸区域活动。拟议开发区域内不存在独特的生境特征，能够支撑任何哺乳动物物种出现异常高的种群密度。黑胁岩袋鼠（Black-flanked Rock-wallaby）的小型种群并未出现在拟议开发区域内。 爬行动物与两栖动物类群——相较于邻近大陆的爬行两栖动物区系，巴罗岛的爬行动物与两栖动物群落较为贫乏。巴罗岛栖息有43种爬行动物，涵盖飞龙蜥、无肢蜥蜴、壁虎、石龙子、盲蛇、巨蜥、蛇类以及1种蛙类。其中多数物种及其栖息生境在巴罗岛分布广泛。目前已在开发区域周边记录到27种爬行动物，占巴罗岛已知陆生爬行动物物种总数的一半以上。大陆沿线拟议民用输气管道的爬行动物群落，预计将因野生捕食者侵扰以及畜牧放牧导致的生境改变而发生退化。列入《环境保护与生物多样性保护法案（EPBC Act）》的皮尔巴拉橄榄蟒仅栖息于皮尔巴拉地区的岩石生境中，预计不会出现在民用输气管道沿线的沙质生境范围内。