热带稀树草原保护区地栖节肢动物对长期规定火制度的反应

IF 2.4 3区 环境科学与生态学 Q2 ECOLOGY
Ludzula Mukwevho , Mduduzi Ndlovu , Gerald Chikowore , Tatenda Dalu , Reyard Mutamiswa , Frank Chidawanyika
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引用次数: 0

摘要

在热带稀树草原生态系统中,火灾很常见,但人们对火灾对节肢动物数量、丰富度、多样性和组成的直接和长期影响知之甚少。为了了解火灾对克鲁格国家公园(KNP)节肢动物的影响,我们在长期试验性烧毁地块(EBPs)的未烧毁地块、每年烧毁地块和每三年烧毁地块使用标准化的坑式陷阱和主动搜寻法收集节肢动物。比较了不同 EBPs 中节肢动物的丰度、丰富度、多样性和集合组成。结果表明,膜翅目节肢动物数量最多(76.4%),尤其是蚁科节肢动物,其次是鞘翅目(18.6%)、鹤形目(3%)、直翅目(1%)和其他小目/次优势目(1%)。不过,鞘翅目节肢动物的物种丰富度较高(30.2%),而蚁形目(24.6%)、鹤形目(24.6%)和直翅目(4%)的物种丰富度较低。不同 EBPs 中多轴类群和姬蜂类群的丰度、丰富度、多样性和集合组成均有显著差异。虽然未烧毁地块的多轴类群和甲虫类群的丰度明显较高,但其物种丰富度和多样性较低,且与一年烧毁地块和三年烧毁地块相比,该地块的甲虫类群组成独特。此外,与未烧毁和三年烧毁一次的生态边界点相比,每年烧毁一次的生态边界点采集到的节肢动物群也有所不同。我们得出的结论是,规定火灾的频率可提高节肢动物的丰富度、多样性和组合组成,同时显著降低丰度。因此,火可以作为一种保护工具,用于保护九龙坡热带稀树草原中的节肢动物。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Responses of Ground-Dwelling Arthropods to Long-Term Prescribed Fire Regimes in a Savanna-Protected Area

In savanna ecosystems, fire is common, yet little is known on the direct and long-term effects of prescribed burns on arthropod abundance, richness, diversity, and composition. To understand the impact of fire on arthropods at Kruger National Park (KNP), standardized pitfall traps and active searches were used to collect arthropods at unburnt, annually burnt, and triennially burnt plots of the long-term experimental burnt plots (EBPs). Abundance, richness, diversity, and assemblage composition of arthropods were compared across EBPs. Results showed that arthropods from the order Hymenoptera, particularly those in the family Formicidae, were the most abundant (76.4%), followed by Coleoptera (18.6%), Araneae (3%), Orthoptera (1%), and other small/less dominant orders (1%). However, the species richness of arthropods from Coleoptera was high (30.2%) compared with Formicidae (24.6%), Araneae (24.6%), and Orthoptera (4%). Abundance, richness, diversity, and assemblage composition of multitaxon and Formicidae were significantly different among EBPs. Although the abundance of multitaxon and Formicidae was significantly high at unburnt plot, species richness and diversity were low while the assemblage composition was unique at this plot compared with the annually and triennially burnt. Furthermore, the assemblage of arthropods in annually burnt EBP differed compared with those collected at unburnt and triennially burnt EBPs. We conclude that the frequency of prescribed fires improves the richness, diversity, and assemblage composition of arthropods with a significant reduction of abundances. Thus, fire can be used as a conservation tool for arthropods in the protected savanna of KNP.

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来源期刊
Rangeland Ecology & Management
Rangeland Ecology & Management 农林科学-环境科学
CiteScore
4.60
自引率
13.00%
发文量
87
审稿时长
12-24 weeks
期刊介绍: Rangeland Ecology & Management publishes all topics-including ecology, management, socioeconomic and policy-pertaining to global rangelands. The journal''s mission is to inform academics, ecosystem managers and policy makers of science-based information to promote sound rangeland stewardship. Author submissions are published in five manuscript categories: original research papers, high-profile forum topics, concept syntheses, as well as research and technical notes. Rangelands represent approximately 50% of the Earth''s land area and provision multiple ecosystem services for large human populations. This expansive and diverse land area functions as coupled human-ecological systems. Knowledge of both social and biophysical system components and their interactions represent the foundation for informed rangeland stewardship. Rangeland Ecology & Management uniquely integrates information from multiple system components to address current and pending challenges confronting global rangelands.
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