期刊
ECOLOGICAL ENTOMOLOGY
卷 45, 期 4, 页码 886-895出版社
WILEY
DOI: 10.1111/een.12865
关键词
Body condition; energetics; landscape; mites; Scarabaeinae; urban ecology
类别
资金
- CONACYT
- Programa Nacional de Pos-Doutorado/Capes 351 (PNPD/CAPES, Brazil)
- CONACYT [257894]
- National Council for Scientific and Technological Development (CNPq-Brazil) [476135/2013-3, 310340/2016-0]
1. Urbanisation causes important losses in biodiversity and ecosystem of animals. To test whether these negative effects are preceded by unhealthy individuals in urban populations, we evaluated the effects of urbanisation on the abundance and physical condition of the dung beetle Dichotomius guaribensis, an endemic species of the Brazilian Atlantic Forest. 2. We sampled beetles in nine forest fragments with different urbanisation degrees, embedded in the urban matrix of the city of Joao Pessoa. Besides testing the abundance in each fragment, we quantified four indicators of physical condition in males and females: body size, body mass, energetic condition, and mite load. 3. Females tended to be larger, and to have less lipid mass and more mites than males. Urbanisation had no effect on beetle abundance, but it negatively affected body mass and lipid content in males, but not females, revealing different sensitivities for both sexes. Body size and mite load were not affected by urbanisation in males or females. Fragment size had no effect on beetle abundance and physical condition in both sexes, suggesting that urbanisation has a greater impact than fragment size on beetle individual condition. 4. In this study, we show that individual deterioration precedes population declines in disturbed environments, and our study opens new insights into the proximate causes that leads to the loss of biodiversity and ecosystem services in urbanised regions.
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