Effects of prescribed fire and fire surrogates on floral visiting insects of the blue ridge province in North Carolina
Effects of prescribed fire and fire surrogates on floral visiting insects of the blue ridge province in North Carolina
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DOI：
10.1016/j.biocon.2006.08.029
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发表时间：
2007-01-01
影响因子：
5.9
通讯作者：
Waldrop, T. A.
中科院分区：
文献类型：
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作者：
Campbell, J. W.;Hanula, J. L.;Waldrop, T. A.
森林中的昆虫授粉是一个极其重要的过程，应该得到保护。传粉昆虫不仅有助于维持森林内植物的多样性，而且还有助于为森林附近的作物授粉。目前，各种森林管理措施对访花昆虫丰度或多样性的影响尚不清楚，因此我们研究了规定焚烧、机械控制灌木以及两者结合对访花昆虫丰度的影响。我们捕获了来自4个目21个科的7921名赏花游客。其中膜翅目昆虫数量最多，种类最多，以蜂科最多，共捕获膜翅目昆虫6科45种。捕获鳞翅目7科35种，鞘翅目6科33种，双翅目2科13种。灌丛机械控制加规定烧伤处理捕获的访花植物数量最多，灌丛机械控制、规定烧伤处理和控制处理捕获的访花植物数量较少。机械加烧伤处理的物种丰富度也更高。传粉者总丰度和大部分目科丰度与树基面积减少和草本植物盖度增加相关。研究表明，森林干扰降低了上层乔木的密度，增加了草本植物的生长量，从而增加了花卉游客的丰度和物种丰富度。(c) 2006 Elsevier Ltd.版权所有。
Pollination by insects in forests is an extremely important process that should be conserved. Not only do pollinating insects help to maintain a diversity of plants within forests, but they also aid in pollinating crops found near forested land. Currently, the effects of various forest management practices on floral visiting insect abundance or diversity is unknown, so we investigated how prescribed burning, mechanical shrub control, and combination of the two affected abundance of floral visiting insects. We caught 7921 floral visitors from four orders and 21 families. Hymenoptera was the most abundant and diverse order, with Halictidae being the most abundant family A total of 45 species of Hymenoptera representing six families were captured. We caught seven families and 35 species of Lepidoptera, six families and 33 species of Coleoptera, and two families and 13 species of Diptera. Most floral visitors were captured in the mechanical shrub control plus prescribed burn treatments, while lower numbers were caught on the mechanical shrub control only, prescribed burn only and control treatments. Overall species richness was also higher on mechanical plus burn treatments. Total pollinator abundance and the abundance of most orders and families was correlated with decreased tree basal area and increased percent herbaceous plant cover. Our study shows that floral visitors increased in abundance and species richness most from forest disturbance that reduced the density of overstory trees and increased the amount of herbaceous plant growth. (c) 2006 Elsevier Ltd. All rights reserved.