Numerically dominant species drive patterns in resource use along a vertical gradient in tropical ant assemblages
Numerically dominant species drive patterns in resource use along a vertical gradient in tropical ant assemblages
复制标题
数量优势物种驱动热带蚂蚁群落沿垂直梯度的资源利用模式
DOI：
10.1111/btp.12743
复制
发表时间：
2019
期刊：
影响因子：
2.1
通讯作者：
Law S
中科院分区：
文献类型：
--
作者：
Law S
资源可用性会影响不同蚁种为满足蚁群的营养需求而采取的觅食策略。在热带雨林中，包括资源可用性在内的环境条件在垂直梯度上有所不同。因此，随着食物网转向更加依赖植物资源，预计氮比碳水化合物对冠层的限制更大。我们在热带雨林中进行了“诱饵选择”实验，研究了蛋白质和碳水化合物使用随身高的差异，并确定了常见物种（数量优势）和稀有物种之间的反应是否存在差异。此外，我们还研究了物种水平上的养分利用。利用物种共现分析，我们通过在树水平上测试蚂蚁物种的共现来检验种间竞争。在调查的12棵树中，鉴定出124种形态种，其中8种占蚂蚁总丰度的90%。物种丰富度和蛋白质利用随饵料高度的增加而增加，常见种属和稀有种属均增加。相应的，相对碳水化合物用量随着身高的增加而减少。我们发现碳水化合物饵料比蛋白质饵料具有更高的物种丰富度。在共现分析中，所有蚁种随机分布于树间。然而，当只考虑常见物种时，物种之间的隔离在树木中是明显的，这为蚂蚁马赛克的存在提供了证据。我们的研究结果表明，冠层中的氮限制可能并不适用于整个蚂蚁群落，而是适用于少数常见物种。
Resource availability can influence the foraging strategy adopted by different ant species as they endeavor to meet nutrient demands of the colony. In tropical rain forests, environmental conditions including resource availability vary over a vertical gradient. Consequently, nitrogen is predicted to become more limiting than carbohydrates toward the canopy as food webs shift to become more reliant on plant‐based resources. We used a “bait‐choice” experiment in a tropical rain forest to examine differences in protein and carbohydrate use with height and determined whether there were differences in response between common (numerically dominant) and rare species. Additionally, we investigated the nutrient use at the species level. Using species co‐occurrence analysis, we examined interspecific competition by testing the co‐occurrence of ant species at the tree level. Over the 12 trees investigated, 124 morphospecies were identified with eight species comprising 90% of total ant abundance. Species richness and protein use increased with height of bait for all species pooled and for common species but not rare species. Correspondingly, relative carbohydrate use decreased with height. We found greater species richness of rare species on carbohydrate baits compared with protein baits. Ant species were randomly distributed among trees when all species were included in co‐occurrence analysis. However, when only common species were considered, segregation between species was evident among trees providing evidence for the presence of ant mosaics. Our results suggest that nitrogen limitation in the canopy may not be true for the whole ant assemblage but rather for the few common species.
登录
查看更多内容
资源失衡在热带树栖蚂蚁进化生态中的作用
影响因子：
1.9
作者：
D. Davidson
通讯作者：
D. Davidson
影响因子：
4.8
作者：
FELLERS, JH
通讯作者：
FELLERS, JH
蚂蚁马赛克都是竞争造成的吗？
影响因子：
2.7
作者：
C. Ribas;J. Schoereder
通讯作者：
J. Schoereder
影响因子：
2.2
作者：
Davidson, DW
通讯作者：
Davidson, DW
影响因子：
0.9
作者：
Y. Hashimoto;Y. Morrimoto;Erwin S. Widodo;Datin Maryati Mohamed;J. Fellowes
通讯作者：
Y. Hashimoto;Y. Morrimoto;Erwin S. Widodo;Datin Maryati Mohamed;J. Fellowes