Multiscale phenological niches of seed fall in diverse A mazonian plant communities
Multiscale phenological niches of seed fall in diverse A mazonian plant communities
复制标题
不同马佐尼亚植物群落中种子掉落的多尺度物候生态位
DOI：
10.1002/ecy.4022
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发表时间：
2023
期刊：
影响因子：
4.8
通讯作者：
Garwood, Nancy C.
中科院分区：
文献类型：
--
作者：
Pak, Damie;Swamy, Varun;Alvarez‐Loayza, Patricia;Cornejo‐Valverde, Fernando;Queenborough, Simon A.;Metz, Margaret R.;Terborgh, John;Valencia, Renato;Wright, S. Joseph;Garwood, Nancy C.
长期以来，物候学一直被假设为生态位划分或种间促进的途径，两者都促进了物种的共存。热带植物群落在生殖物候方面表现出惊人的多样性，但许多植物群落也以大型同步生殖事件而闻名。在这里，我们研究是否在这样的社区种子下降的物候是非随机的，物候模式的时间尺度，和生态因素，驱动生殖物候。我们应用多变量小波分析来测试物候同步性与补偿动力学（即，一个物种的下降被另一个物种的上升所补偿的反同步模式）。我们使用了亚马逊西部高度多样性植物群落的长期种子雨监测数据。我们在多个时间尺度上发现了显着的同步全群落物候，与物种之间共享的环境响应或积极的相互作用一致。我们还观察到补偿和同步物候内的物种（confamilials）可能共享的性状和种子传播机制。风分散的物种表现出显着的同步性在~6个月的尺度，这表明这些物种可能共享物候生态位，以匹配风的季节性。我们的研究结果表明，共同的环境响应，但热带植物物候的多样性可能部分是由于时间生态位划分的群落物候。群落物候模式的规模特异性和时间局部化性质凸显了物候的多重和不断变化的驱动因素的重要性。
Phenology has long been hypothesized as an avenue for niche partitioning or interspecific facilitation, both promoting species coexistence. Tropical plant communities exhibit striking diversity in reproductive phenology, but many are also noted for large synchronous reproductive events. Here we study whether the phenology of seed fall in such communities is nonrandom, the temporal scales of phenological patterns, and ecological factors that drive reproductive phenology. We applied multivariate wavelet analysis to test for phenological synchrony versus compensatory dynamics (i.e., antisynchronous patterns where one species' decline is compensated by the rise of another) among species and across temporal scales. We used data from long‐term seed rain monitoring of hyperdiverse plant communities in the western Amazon. We found significant synchronous whole‐community phenology at multiple timescales, consistent with shared environmental responses or positive interactions among species. We also observed both compensatory and synchronous phenology within groups of species (confamilials) likely to share traits and seed dispersal mechanisms. Wind‐dispersed species exhibited significant synchrony at ~6‐month scales, suggesting these species might share phenological niches to match the seasonality of wind. Our results suggest that community phenology is shaped by shared environmental responses but that the diversity of tropical plant phenology may partly result from temporal niche partitioning. The scale‐specificity and time‐localized nature of community phenology patterns highlights the importance of multiple and shifting drivers of phenology.