Environmental factors associated to breeding areas of the South American locust Schistocerca cancellata on a regional scale

IF 1.6 4区 环境科学与生态学 Q3 ECOLOGY
Austral Ecology Pub Date : 2024-08-07 DOI:10.1111/aec.13568
M. Celeste Scattolini, Cyril Piou, Héctor Medina, Rosario Iglesias, Alina Cerquetti, María M. Cigliano
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引用次数: 0

Abstract

Locusts are globally recognized as major pest threats. In the first half of the 20th century, the South American locust caused great economic losses. After the implementation of preventive management, large-scale upsurges ceased. In 2015, resurgence of S. cancellata led to swarms affecting northern Argentina, Paraguay, and Bolivia, prompting control agencies to address an almost forgotten problem. After six decades without a major locust outbreak, there were limited and outdated studies on this species. This study aims to identify key environmental factors associated with the spatial distribution of S. cancellata oviposition sites. We focus on explanatory variables that represent physical and chemical properties of soil and vegetation cover. To understand the relationships between each potential explanatory variable and the presence-absence of S. cancellata oviposition sites, we first performed regression analyses applying a linear and quadratic structure for each explanatory variable. Then, we performed comparisons of logistic regression models in a multi-model inference framework, where CAIC and weights of evidence were analysed. Our results show that the South American locusts chose to lay their eggs in areas with a low proportion of natural forest and flooded grasslands and a high proportion of non-vegetated areas, where the soils are flat, with neutral pH, and low salinity. We also determined that an increase in the proportion of cultivated areas is associated with an increase in the probability of breeding presence of this species. The locust's habitat falls within the Dry Chaco, a global deforestation hotspot, evidencing a rapid replacing of forests for plantations. Since both the diminish of forest and the increase in cultivated areas are associated with an increase in oviposition sites, we consider that breeding areas will likely increase. The results found herein can be used to map the potential breeding habitats to help preventive management against the South American locust.

区域范围内与南美蝗虫 Schistocerca cancellata 繁殖区相关的环境因素
蝗虫是全球公认的主要害虫威胁。20 世纪上半叶,南美蝗虫造成了巨大的经济损失。在实施预防性管理后,大规模的蝗虫暴发现象停止了。2015 年,S. cancellata 的卷土重来导致蝗群影响阿根廷北部、巴拉圭和玻利维亚,促使防治机构解决这个几乎被遗忘的问题。在六十年未爆发大规模蝗虫疫情之后,有关该物种的研究十分有限,而且已经过时。本研究旨在确定与 S. cancellata 产卵地点空间分布相关的关键环境因素。我们将重点放在代表土壤和植被覆盖的物理和化学特性的解释变量上。为了了解每个潜在解释变量与松果菊产卵点存在与否之间的关系,我们首先对每个解释变量进行了线性和二次结构的回归分析。然后,我们在多模型推断框架下对逻辑回归模型进行了比较,分析了 CAIC 和证据权重。我们的结果表明,南美蝗虫选择在天然林和水淹草地比例低、无植被地区比例高的地区产卵,这些地区的土壤平坦、pH 值为中性、盐度低。我们还确定,耕地面积比例的增加与该物种繁殖概率的增加有关。蝗虫的栖息地位于干查科地区,该地区是全球森林砍伐的热点地区,森林正迅速被种植园取代。由于森林的减少和种植面积的增加都与产卵地点的增加有关,因此我们认为繁殖区域可能会增加。本文的研究结果可用于绘制潜在的繁殖栖息地图,以帮助对南美蝗虫进行预防性管理。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Austral Ecology
Austral Ecology 环境科学-生态学
CiteScore
2.90
自引率
6.70%
发文量
117
审稿时长
12-24 weeks
期刊介绍: Austral Ecology is the premier journal for basic and applied ecology in the Southern Hemisphere. As the official Journal of The Ecological Society of Australia (ESA), Austral Ecology addresses the commonality between ecosystems in Australia and many parts of southern Africa, South America, New Zealand and Oceania. For example many species in the unique biotas of these regions share common Gondwana ancestors. ESA''s aim is to publish innovative research to encourage the sharing of information and experiences that enrich the understanding of the ecology of the Southern Hemisphere. Austral Ecology involves an editorial board with representatives from Australia, South Africa, New Zealand, Brazil and Argentina. These representatives provide expert opinions, access to qualified reviewers and act as a focus for attracting a wide range of contributions from countries across the region. Austral Ecology publishes original papers describing experimental, observational or theoretical studies on terrestrial, marine or freshwater systems, which are considered without taxonomic bias. Special thematic issues are published regularly, including symposia on the ecology of estuaries and soft sediment habitats, freshwater systems and coral reef fish.
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