Changes in positive associations among vertebrate predators at South Georgia during winter
Changes in positive associations among vertebrate predators at South Georgia during winter
复制标题
冬季南乔治亚岛脊椎动物捕食者之间积极关联的变化
DOI：
10.1007/s00300-020-02720-4
复制
发表时间：
2020
期刊：
影响因子：
1.7
通讯作者：
Manne, Lisa L.
中科院分区：
文献类型：
--
作者：
Monier, Samantha A.;Veit, Richard R.;Manne, Lisa L.
我们研究了积极的协会之间的海鸟和海洋哺乳动物在南格鲁吉亚的研究巡航在南极冬季的1985年，1991年和1993年，发现统计上的显着差异。我们收集了有关丰度和分布的数据，为预测未来环境变化的亚南极保护提供了重要参考。我们发现29%的物种的丰度发生了显着变化，从而改变了物种多样性。我们假设，由此产生的改变社区组成可能有以前未预料到的人口的影响，对组成物种，由于物种之间的积极相互作用的变化，相互利用的线索猎物的存在。我们发现脊椎动物捕食者之间的空间重叠减少了近三倍，这与海水温度升高有关。随着未来积极关联的强度和机会减少，喂养成功可能会受到负面影响。通过这种方式，环境变化可能会不成比例地影响捕食者的丰度，而且这种变化可能已经在进行中，因为自我们的调查以来，南大洋的温度已经大幅上升。当然，我们描述的变化不仅仅是由于海水温度变化或任何其他单一原因造成的--许多因素都很重要，我们并不声称已经将这些因素排除在外。相反，我们报告了以前没有记录的物种之间正相关的变化，并认为这些变化可能会持续到未来，因为几乎可以肯定的是，与气候相关的变化会持续增加。
We studied positive associations among seabirds and marine mammals at South Georgia on research cruises during the Austral winters of 1985, 1991 and 1993 and found statistically significant differences. We collected data on abundance and distribution, providing a critical reference for sub-Antarctic conservation in anticipation of future environmental changes. We found significant changes in the abundance of 29% of species surveyed and a consequent change in species diversity. We postulate that the resulting altered community composition may have previously unanticipated population effects on the component species, due to changes in positive interactions among species which use each other as cues to the presence of prey. We found a near threefold reduction in spatial overlap among vertebrate predators, associated with warming sea temperatures. As the strength and opportunity for positive associations decreases in the future, feeding success may be negatively impacted. In this way, environmental changes may disproportionately impact predator abundances and such changes are likely already underway, as Southern Ocean temperatures have increased substantially since our surveys. Of course the changes we describe are not solely due to changing sea temperature or any other single cause—many factors are important and we do not claim to have removed these from consideration. Rather, we report previously undocumented changes in positive associations among species, and argue these changes may continue into the future, given near-certain continued increases in climate-related changes.
登录
查看更多内容
DOI：
--
发表时间：
1987
期刊：
影响因子：
--
作者：
P. Harrison
通讯作者：
P. Harrison
影响因子：
14.6
作者：
Martijn Gough
通讯作者：
Martijn Gough
南乔治亚岛附近的中上层捕食者及其主要猎物南极磷虾的聚集模式
影响因子：
4.8
作者：
R. Veit;E. Silverman;I. Everson
通讯作者：
I. Everson
利用学习偏差对于将社会学习应用于保护至关重要
影响因子：
2.3
作者：
A. Greggor;Alex Thornton;N. Clayton
通讯作者：
N. Clayton
南乔治亚岛变化的生态驱动因素：磷虾过剩或气候变化
影响因子：
5.9
作者：
P. Trathan;N. Ratcliffe;Elizabeth A. Masden
通讯作者：
Elizabeth A. Masden