Habitat modelling of crabeater seals (Lobodon carcinophaga) in the Weddell Sea using the multivariate approach Maxent
Habitat modelling of crabeater seals (Lobodon carcinophaga) in the Weddell Sea using the multivariate approach Maxent
复制标题
使用多元方法 Maxent 对威德尔海食蟹海豹 (Lobodon carcinophaga) 进行栖息地建模
DOI：
10.1007/s00300-016-2020-0
复制
发表时间：
2017
期刊：
影响因子：
1.7
通讯作者：
Bornemann
中科院分区：
文献类型：
--
作者：
Nachtsheim;Jerosch;Plötz;Bornemann
食蟹海豹（Lobodon carcinophaga）是数量最多的南极海豹，栖息在南大洋的极地浮冰带。到目前为止，关于影响其分布和觅食行为的重要环境因素的信息有限。1998年夏季，在威德尔海东部的Drescher Inlet(72.85°S, 19.26°E)， 12只不同年龄的食蟹海豹携带卫星连接潜水记录仪。为了确定威德尔海中适宜的栖息地条件，采用了最大熵（Maxent）建模方法。该模型显示，威德尔海东部和南部特别适合食蟹海豹。在整个研究期间，到大陆架断裂的距离和海冰浓度是模拟物种分布的两个最重要参数。模型预测表明，食蟹海豹对其有利的海冰条件所强调的季节性变化的环境表现出动态反应。食蟹海豹大量利用无冰水域，这可能是1998年夏季威德尔海海冰相对较少的原因。潜水行为以短潜（> 90% = 0-4 min）和浅潜（> 90% = 0-51 m）为特征。这种模式反映了食蟹海豹典型的夏秋觅食行为。其分布和觅食行为都与南极磷虾（Euphausia superba）的生活史相吻合，南极磷虾是食蟹海豹的首选猎物。预测的适宜生境条件与磷虾的可能生境基本一致，说明磷虾对主要猎物的依赖性较强。
The crabeater seal (Lobodon carcinophaga) is the most abundant Antarctic seal and inhabits the circumpolar pack ice zone of the Southern Ocean. Until now, information on important environmental factors affecting its distribution as well as on foraging behaviour is limited. In austral summer 1998, 12 crabeater seals of both sexes and different age classes were equipped with satellite-linked dive recorders at Drescher Inlet (72.85°S, 19.26°E), eastern Weddell Sea. To identify suitable habitat conditions within the Weddell Sea, a maximum entropy (Maxent) modelling approach was implemented. The model revealed that the eastern and southern Weddell Sea is especially suitable for crabeater seals. Distance to the continental shelf break and sea ice concentration were the two most important parameters in modelling species distribution throughout the study period. Model predictions demonstrated that crabeater seals showed a dynamic response to their seasonally changing environment emphasized by the favoured sea ice conditions. Crabeater seals utilized ice-free waters substantially, which is potentially explained by the comparatively low sea ice cover of the Weddell Sea during summer 1998. Diving behaviour was characterized by short (>90 % = 0–4 min) and shallow (>90 % = 0–51 m) dives. This pattern reflects the typical summer and autumn foraging behaviour of crabeater seals. Both the distribution and foraging behaviour corresponded well with the life history of the Antarctic krill (Euphausia superba), the preferred prey of crabeater seals. In general, predicted suitable habitat conditions were congruent with probable habitats of krill, which emphasizes the strong dependence on their primary prey.
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影响因子：
1.6
作者：
D. Siniff;R. Garrott;J. Rotella;W. Fraser;D. Ainley
通讯作者：
D. Ainley
南极洲威德尔海的中型和大型浮游动物群落
影响因子：
1.7
作者：
E. Boysen;U. Piatkowski
通讯作者：
U. Piatkowski
海洋生物学和西弗格尔生物学
DOI：
--
发表时间：
1983
期刊：
影响因子：
--
作者：
E. Drescher;J. Plötz
通讯作者：
J. Plötz
南方春季食蟹海豹（Lobodon carcinophagus）的社会和繁殖行为
DOI：
--
发表时间：
1979
期刊：
影响因子：
--
作者：
D. Siniff;I. Stirling;J. L. Bengston;R. Reichle
通讯作者：
R. Reichle
影响因子：
1.4
作者：
Jerosch;Krajnik;Scharf;Dorschel
通讯作者：
Dorschel