Mery Ingrid Guimarães de Alencar, André T C Dias, Ana Elizabeth Bonato Asato, Adriano Caliman
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Flower litter decomposed, on average, three times faster than leaf litter (11.9% and 39.4% mass remaining, respectively) and exhibited higher water-holding capacity (WHC), leaching (LEA), and N, P, and K content. Otherwise, leaf litter showed higher density (DEN) and Ca, Mg, and Na content. The average relative differences in decomposition rate and functional traits between flower and leaf litter did not differ at both intra- and inter-specific levels. The predictors of decomposition were mostly similar, explaining 39% and 37% of flower and leaf litter, respectively. Leaching, P, Ca, Mg, and Na predict both flower and leaf-litter decomposition. However, WHC exclusively predicted flower-litter decomposition, and DEN, N, and K exclusively predicted leaf-litter decomposition. 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引用次数: 0
摘要
物种内部和物种之间的差异会通过改变枯落物的可分解性对碳和养分循环产生后续影响。然而,对叶片的关注可能并不能反映整个植物的经济策略。在此,我们评估了巴西东北部 29 种热带木本植物的花和叶废弃物在种内(即同一物种的花和叶)和种间(即不同物种的花和叶)水平上的分解模式和预测因素。我们评估了垃圾的九种功能特征,包括结构和化学特征。花屑的分解速度平均比叶屑快三倍(剩余质量分别为 11.9% 和 39.4%),并表现出更高的持水量(WHC)、浸出率(LEA)以及氮、磷和钾含量。此外,枯落叶的密度(DEN)以及钙、镁和钠的含量也较高。在种内和种间水平上,花屑和叶屑在分解率和功能特征方面的平均相对差异没有差异。分解的预测因子基本相似,对花叶垃圾的解释率分别为 39% 和 37%。沥滤、P、Ca、Mg 和 Na 都能预测花和叶屑的分解。然而,WHC 只能预测花残体的分解,而 DEN、N 和 K 只能预测叶残体的分解。观察到的花屑和叶屑在分解率和功能特征上的差异表明,这些植物器官的后生效应是不同的,同时也说明了花屑的作用及其对生态系统养分和碳循环的次生影响。
Patterns of decomposition and functional traits for flower and leaf litter in tropical woody species.
The variation within and across species has afterlife effects on carbon and nutrient cycling through the alteration of litter decomposability. However, the focus on leaves may not reflect a whole-plant economic spectrum of strategies. Here, we assessed the patterns and predictors of flower and leaf-litter decomposition at the intra- (i.e., flowers and leaves of the same species) and inter-specific (i.e., flowers and leaves from different species) levels for 29 tropical woody species in northeast Brazil. We evaluated nine functional litter traits, including structural and chemical traits. Flower litter decomposed, on average, three times faster than leaf litter (11.9% and 39.4% mass remaining, respectively) and exhibited higher water-holding capacity (WHC), leaching (LEA), and N, P, and K content. Otherwise, leaf litter showed higher density (DEN) and Ca, Mg, and Na content. The average relative differences in decomposition rate and functional traits between flower and leaf litter did not differ at both intra- and inter-specific levels. The predictors of decomposition were mostly similar, explaining 39% and 37% of flower and leaf litter, respectively. Leaching, P, Ca, Mg, and Na predict both flower and leaf-litter decomposition. However, WHC exclusively predicted flower-litter decomposition, and DEN, N, and K exclusively predicted leaf-litter decomposition. The observed differences in decomposition rate and functional traits between flower and leaf litter indicate that the afterlife effects differ between these plant organs and leverage the role of flower litter and its secondary consequences to nutrient and carbon cycling on ecosystems.
期刊介绍:
Oecologia publishes innovative ecological research of international interest. We seek reviews, advances in methodology, and original contributions, emphasizing the following areas:
Population ecology, Plant-microbe-animal interactions, Ecosystem ecology, Community ecology, Global change ecology, Conservation ecology,
Behavioral ecology and Physiological Ecology.
In general, studies that are purely descriptive, mathematical, documentary, and/or natural history will not be considered.