Seed size of co‐occurring forb species predicts rates of predispersal seed loss from insects
Seed size of co‐occurring forb species predicts rates of predispersal seed loss from insects
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DOI：
10.1002/ecs2.4032
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发表时间：
2022-04
期刊：
影响因子：
2.7
通讯作者：
Jakob B. Palmer;P. Hahn;E. Metcalf;J. Maron
中科院分区：
文献类型：
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作者：
Jakob B. Palmer;P. Hahn;E. Metcalf;J. Maron
植物在传播前的种子被昆虫捕食时，常常面临种子的慢性损失。虽然许多研究已经记录了不同群落中单个物种的种子损失率，但尚不清楚同一群落中共存物种的扩散前种子捕食率如何变化。如果种间种子损失的不对称性很大，这种共同的相互作用可能有重要的影响共存。物种特征，如种子大小或种子的氮和碳，可能与种间的变化在predispensal种子捕食共发生的草地杂类草物种。我们收集了13个共同发生的杂类草种从每个蒙大拿州西部草原超过2年。我们量化的种子损失的幅度，由于predispersal种子捕食昆虫。种子损失率平均为15.8%。种子较大的物种遭受显着较高水平的predispersion种子捕食比种子较小的物种，种子大小预测种子损失种子氮或碳。虽然大种子的物种往往有更大的比例招聘和早期生存比小种子的物种，我们的研究表明，这些优势部分抵消了更大的predispersal种子损失与较小的种子物种。在predispersion种子捕食的不对称性可能会影响这些物种之间的共存。
Plants often face chronic seed loss from predispersal seed predation by insects. Although many studies have documented the rates of seed loss for single species in different communities, it is unclear how rates of predispersal seed pre-dation vary among co-occurring species within the same community. If interspecific asymmetries in seed loss are great, this common interaction could have important implications for coexistence. Species traits, such as seed size or seed nitrogen and carbon, might correlate with interspecific variation in predispersal seed predation among co-occurring grassland forb species. We collected infructescences from 13 co-occurring forb species from each of four western Montana grasslands over 2 years. We quantified the magnitude of seed loss due to predispersal seed predation by insects. The average level of seed loss was 15.8%. Larger seeded species suffered significantly higher levels of predispersal seed predation than smaller seeded species, and seed size predicted seed loss more than seed nitrogen or carbon. Although large-seeded species often have greater proportional recruitment and early survival than small-seeded species, our study suggests that these advantages are partially counterbalanced by greater predispersal seed loss for larger versus smaller seeded species. Asymmetries in predispersal seed predation may importantly affect coexistence among these species.