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Altitudinal distribution and diversity of insects in miombo woodlands in Inhamacari, Manica Province, central Mozambique
African Journal of Ecology ( IF 1 ) Pub Date : 2020-02-03 , DOI: 10.1111/aje.12718
Osório Nhiuane 1 , Cláudio Cuaranhua 1 , Romana Rombe Bandeira 1
Affiliation  

To evaluate the role of altitude on distribution pattern and diversity of entomofauna on miombo woodlands, four altitudes (850, 1,000, 1,250 and 1,400 m) were selected in a characteristic mountainous forest of Inhamacari in Mozambique in July 2015. In each sampling altitude, a linear transect with 16 yellow pan traps spaced 2 m apart was established for insect capture. Capture results allowed assessment of insect distribution by determination of insect abundance and relative frequency. Insect diversity estimates were determined by Shannon–Wiener and Simpson indices. Altitude similarity was assessed by the Jaccard coefficient. The chi‐square test (urn:x-wiley:01416707:media:aje12718:aje12718-math-0001) was used to compare insect abundance and distribution along the altitudinal gradient. Altitude significantly affected insect abundance, relative frequency and distribution, with a nonlinear decrease with increasing altitude. Families Formicidae (Hymenoptera) and Cecidomyiidae (Diptera) were most dominant. Highest diversity and more families confined to unique altitudinal positions were found at 1,250 m while the lowest diversity was observed at 1,000 m.a.s.l. Among the altitudes, greater similarity was found between 1,000 and 1,400 m. In conclusion, altitude had a significant effect on insect family's distribution. However, further research is recommended in order to understand effect of vegetation composition and structure on insect diversity at different altitudes.

中文翻译:

莫桑比克中部马尼卡省伊尼默卡里市米诺博林地昆虫的垂直分布和多样性

为了评估海拔高度对密欧博林地昆虫动物分布格局和多样性的作用,2015年7月在莫桑比克伊纳玛卡里的一个特色山区森林中选择了四个海拔高度(850、1,000、1,250和1,400 m)。建立了线性横断面,该横断面具有16个相距2 m的黄色泛陷阱,用于捕获昆虫。捕获结果可以通过确定昆虫的丰度和相对频率来评估昆虫的分布。昆虫多样性估计值由Shannon-Wiener和Simpson指数确定。高度相似性通过Jaccard系数进行评估。卡方检验(缸:x-wiley:01416707:media:aje12718:aje12718-math-0001)被用来比较昆虫的丰度和沿高度梯度的分布。海拔高度显着影响昆虫的丰度,相对频率和分布,并且随着海拔的升高呈非线性下降。甲虫科(膜翅目)和Ce虫科(双翅目)是最主要的。在1,250 m处发现了最高的多样性和更多的家庭,被限制在独特的海拔位置,而在1,000 masl之间发现了最低的多样性,在1,000至1,400 m之间发现了更大的相似性。总之,海拔高度对昆虫科的分布有重要影响。但是,建议进一步研究,以了解不同海拔高度的植被组成和结构对昆虫多样性的影响。
更新日期:2020-02-03
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