Phenological indicators of resources offered to leaf herbivores in restinga communities

IF 2.4 2区生物学 Q2 PLANT SCIENCES American Journal of Botany Pub Date : 2024-12-07 DOI:10.1002/ajb2.16445

Maiara Matilde da Silva, Maria Regina Torres Boeger, João Carlos Ferreira de Melo-Júnior

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Abstract

Premise

Plants can limit the leaf tissue consumed by insect herbivores through chemical, structural, and nutritional leaf defenses or by escaping in space and time. Escaping is related to the phenological patterns of plants, which in turn respond to climatic factors. This study evaluated leaf production in a coastal plant community in southern Brazil to test the following hypotheses: (1) Leaves are continuously produced in this ecosystem, and (2) synchrony acts as an escape strategy from herbivory.

Methods

We evaluated leaf production patterns of 20 herbaceous, shrub, and tree species for 2 years using the Fournier index then measured leaf consumption in the second year. The Rayleigh test was used to verify the synchrony of phenological events. Correlations between leaf production and climatic factors and between leaf production synchrony and herbivory were analyzed.

Results

New leaves were continuously produced at the plant community scale, but herbaceous and shrub species showed a phenological pattern distinct from that of tree species. Trees had peaks of synchrony in leaf production that were positively correlated with amount of leaf tissue consumed, refuting the hypothesis that synchrony acts as an escape strategy.

Conclusions

The phenological and herbivory patterns in this plant community may be due to the supply of resources in the soil and the composition of the insect community.

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restinga群落叶片食草动物提供资源的物候指标。

前提：植物可以通过化学、结构和营养的叶片防御或在空间和时间上的逃逸来限制昆虫食草动物消耗的叶片组织。逃逸与植物的物候模式有关，而物候模式又对气候因素作出反应。本研究对巴西南部沿海植物群落的叶片生产进行了评估，以验证以下假设：(1)叶片在该生态系统中连续生产；(2)同步性是一种逃避草食的策略。方法：利用富尼耶指数对20种草本、灌木和乔木树种2年的叶片生产模式进行评价，并在第二年测量叶片消耗量。采用瑞利试验验证物候事件的同步性。分析了产叶与气候因子、产叶同步性与草食性的相关性。结果：在植物群落尺度上新叶不断产生，但草本和灌木物种表现出不同于乔木物种的物候模式。树木在叶片生产中的同步性峰值与消耗的叶组织数量正相关，驳斥了同步性是一种逃避策略的假设。结论：该植物群落的物候和草食格局可能与土壤资源供应和昆虫群落组成有关。

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来源期刊

American Journal of Botany 生物-植物科学

CiteScore

4.90

自引率

6.70%

发文量

171

审稿时长

3 months

期刊介绍： The American Journal of Botany (AJB), the flagship journal of the Botanical Society of America (BSA), publishes peer-reviewed, innovative, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, algae, fungi, and lichens). AJB requires authors to frame their research questions and discuss their results in terms of major questions of plant biology. In general, papers that are too narrowly focused, purely descriptive, natural history, broad surveys, or that contain only preliminary data will not be considered.