Fragmentation mediates thermal habitat choice in ciliate microcosms
Fragmentation mediates thermal habitat choice in ciliate microcosms
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破碎介导纤毛虫微观世界的热栖息地选择
DOI：
10.1098/rspb.2019.2818
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
S. Jacob
中科院分区：
文献类型：
--
作者：
Estelle Laurent;N. Schtickzelle;S. Jacob
生境破碎化预计会因斑块间距离增加而减少斑块之间的扩散运动。此外，由于生境破碎化预计会增加在景观中斑块间移动的成本，它应该会阻碍生物做出明智扩散决策的能力或倾向。在此，我们利用嗜热四膜虫的微观世界来实验性地测试通过连接不同温度斑块的廊道长度所操纵的生境破碎化是否会影响栖息地选择。我们表明，斑块间距离增加一倍会如预期那样阻碍生物在迁入时选择栖息地的能力。有趣的是，它也增加了它们在迁出时的栖息地选择，这表明当获取关于邻近斑块的信息变得更困难时，生物在决定是留在还是离开其斑块时会变得更加挑剔。这项研究指出，生境破碎化可能不仅影响扩散速率，还影响扩散的非随机性程度，迁出和迁入决策受到的影响不同。破碎化的这些后果可能会极大地改变面临环境变化的种群的生态和进化动态。
Habitat fragmentation is expected to reduce dispersal movements among patches as a result of increased inter-patch distances. Furthermore, since habitat fragmentation is expected to raise the costs of moving among patches in the landscape, it should hamper the ability or tendency of organisms to perform informed dispersal decisions. Here, we used microcosms of the ciliate Tetrahymena thermophila to test experimentally whether habitat fragmentation, manipulated through the length of corridors connecting patches differing in temperature, affects habitat choice. We showed that a twofold increase of inter-patch distance can as expected hamper the ability of organisms to choose their habitat at immigration. Interestingly, it also increased their habitat choice at emigration, suggesting that organisms become choosier in their decision to either stay or leave their patch when obtaining information about neighbouring patches gets harder. This study points out that habitat fragmentation might affect not only dispersal rate but also the level of non-randomness of dispersal, with emigration and immigration decisions differently affected. These consequences of fragmentation might considerably modify ecological and evolutionary dynamics of populations facing environmental changes.
栖息地匹配和表型的空间异质性：对集合种群和元群落功能的影响
影响因子：
1.9
作者：
Bestion;Legrand;Clobert
通讯作者：
Clobert
影响因子：
5.9
作者：
Cote, Julien;Bestion, Elvire;Baguette, Michel
通讯作者：
Baguette, Michel