Land Use Modulates Herbivory on Juvenile Stages of Woody Species in a Chaco Dry Forest

IF 2 3区 环境科学与生态学 Q3 ECOLOGY
Julián Medrano Santos, María Lucrecia Lipoma, Lucas Enrico
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引用次数: 0

Abstract

Aims

Land use modifies natural forest herbivore assemblages by cattle introduction and structural alteration that impact invertebrate diversity. This land use and herbivory combined effect is particularly relevant for woody plant juveniles, which are key stages for regeneration. We aimed to understand how herbivory on juvenile woody plants is affected by land use. In this study, we analyzed how vertebrate and invertebrate herbivory patterns on seedlings and saplings change between land uses in winter and summer seasons.

Location

Southernmost Gran Chaco region, Córdoba province, central Argentina.

Methodology

We assessed the invertebrate and vertebrate herbivory on seedlings and saplings of woody species during summer and winter seasons at four different land use types of a Chaco dry forest. Land use types were classified according to the increasing intensity of disturbance (logging and grazing) they are subjected to: Conserved Forest (CF; no disturbance), Secondary Forest (SF; low disturbance), Closed Species-rich Shrubland (CS; intermediate disturbance), and Open Shrubland (OS; high disturbance).

Results

We found that total herbivory was consistently higher in SF and CS in both seasons. Vertebrate herbivory was higher than invertebrate herbivory in winter (except in CF), with the inverse pattern in summer. Differences between seedling and sapling stages were scarce, with not consistent patterns of herbivory between seasons.

Conclusions

This study shows a pronounced effect of land use on seasonal herbivory patterns and dynamics. The vegetation structure of communities under low and intermediate disturbance intensities would promote diversity of invertebrate herbivores, which, combined with cattle introduction, could result in herbivory complementation and additivity. Understanding how environmental filters, like anthropic activities and herbivory, interplay and affect early growth stages is crucial to achieving land use practices that do not compromise forest resilience and regeneration.

Abstract Image

土地利用对查科干旱林木本植物幼期食草性的调节
目的土地利用通过牛的引入和影响无脊椎动物多样性的结构改变来改变天然森林食草动物的组合。这种土地利用和草食综合效应对木本植物幼树尤其重要,幼树是植被更新的关键阶段。我们的目的是了解幼木本植物的食草性如何受到土地利用的影响。在本研究中,我们分析了冬季和夏季不同土地利用方式下脊椎动物和无脊椎动物对幼苗和幼树的食草模式的变化。位置阿根廷中部,Córdoba省,最南端的格兰查科地区。方法研究了查科干旱林4种不同土地利用类型夏季和冬季对木本树种幼苗和树苗的无脊椎动物和脊椎动物的摄食情况。土地利用类型根据其受到的干扰(伐木和放牧)的强度进行分类:保护区(CF);无干扰),次生林(SF;低干扰),封闭的物种丰富的灌木林地(CS;开放灌丛(OS;高干扰)。结果在两个季节,SF和CS的总食草性都较高。冬季脊椎动物食草性高于无脊椎动物食草性(CF区除外),夏季则相反。苗期和幼树期之间的差异不大,不同季节之间的食草模式不一致。结论土地利用对季节性草食格局和动态有显著影响。低、中干扰强度下的群落植被结构会促进无脊椎食草动物的多样性,并与牛的引入相结合,形成食草动物的互补和加性。了解人为活动和草食活动等环境过滤器如何相互作用并影响早期生长阶段,对于实现不损害森林恢复力和再生的土地利用做法至关重要。
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来源期刊
Applied Vegetation Science
Applied Vegetation Science 环境科学-林学
CiteScore
6.00
自引率
10.70%
发文量
67
审稿时长
3 months
期刊介绍: Applied Vegetation Science focuses on community-level topics relevant to human interaction with vegetation, including global change, nature conservation, nature management, restoration of plant communities and of natural habitats, and the planning of semi-natural and urban landscapes. Vegetation survey, modelling and remote-sensing applications are welcome. Papers on vegetation science which do not fit to this scope (do not have an applied aspect and are not vegetation survey) should be directed to our associate journal, the Journal of Vegetation Science. Both journals publish papers on the ecology of a single species only if it plays a key role in structuring plant communities.
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