Tropical herbivorous phasmids, but not litter snails, alter decomposition rates by modifying litter bacteria.
Tropical herbivorous phasmids, but not litter snails, alter decomposition rates by modifying litter bacteria.
复制标题
热带草食性噬菌体（但不是垫料蜗牛）通过改变垫料细菌来改变分解速率。
DOI：
10.1002/ecy.2169
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发表时间：
2018
期刊：
影响因子：
4.8
通讯作者：
G. González
中科院分区：
文献类型：
--
作者：
C. Prather;G. Belovsky;S. Cantrell;G. González
在许多生态系统中，消费者可以通过粪便和选择性摄食来改变分解率，但这些综合效应在热带生态系统中很少被研究。碎屑食物网的成员（凋落物饲养者或微生物）应该比食草动物，绿色食物网的成员有更大的影响分解。使用垃圾袋实验在一个领域的封闭实验中，我们确定了相对影响的共同垃圾蜗牛（Megalomastoma croceum）和草食性手杖（Lamponius portoricensis）的垃圾组成，分解率，和微生物在波多黎各雨林，以及消费者的影响是否改变了树冠覆盖的存在。虽然冠层的存在并没有改变消费者的影响，焦点生物有意想不到的影响分解。分解不改变凋落物蜗牛，但草食性手杖通过减少高品质的凋落物丰度，因此，较低的细菌丰富度和丰度减少了约50%的叶分解。这种相对未开发的，但潜在的重要联系热带食草动物，碎屑，在这片森林中的垃圾微生物表明，有必要考虑自养的影响时，检查雨林生态系统的过程。
Consumers can alter decomposition rates through both feces and selective feeding in many ecosystems, but these combined effects have seldom been examined in tropical ecosystems. Members of the detrital food web (litter-feeders or microbivores) should presumably have greater effects on decomposition than herbivores, members of the green food web. Using litterbag experiments within a field enclosure experiment, we determined the relative effects of common litter snails (Megalomastoma croceum) and herbivorous walking sticks (Lamponius portoricensis) on litter composition, decomposition rates, and microbes in a Puerto Rican rainforest, and whether consumer effects were altered by canopy cover presence. Although canopy presence did not alter consumers' effects, focal organisms had unexpected influences on decomposition. Decomposition was not altered by litter snails, but herbivorous walking sticks reduced leaf decomposition by about 50% through reductions in high quality litter abundance and, consequently, lower bacterial richness and abundance. This relatively unexplored but potentially important link between tropical herbivores, detritus, and litter microbes in this forest demonstrates the need to consider autotrophic influences when examining rainforest ecosystem processes.