Tropical rainforest and human-modified landscapes support unique butterfly communities that differ in abundance and diversity

Sambhu, Hemchandranauth, Northfield, Tobin, Nankishore, Alliea, Ansari, Abdullah, and Turton, Steve (2017) Tropical rainforest and human-modified landscapes support unique butterfly communities that differ in abundance and diversity. Environmental Entomology, 46 (6). pp. 1225-1234.

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View at Publisher Website: http://dx.doi.org/10.1093/ee/nvx129
 
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Abstract

Tropical forests account for at least 50 percent of documented diversity, but anthropogenic activities are converting forests to agriculture and urban areas at an alarming rate, with potentially strong effects on insect abundance and diversity. However, the questions remain whether insect populations are uniformly affected by land conversion, and if insect conservation can occur in agricultural margins and urban gardens. We compare butterfly populations in tropical secondary forests to those found in sugarcane and urban areas in coastal Guyana and evaluate the potential for particular butterfly communities to inhabit human-modified landscapes. Butterflies were sampled for one year using fruit-baited traps in three separated geographical locations on the coast. We used non-metric multidimensional scaling to assess differences in species assemblages and a generalized linear mixed model to evaluate abundance, species richness, evenness and diversity. The secondary forests in all three locations supported higher butterfly abundance and diversity than other human-modified areas, although the magnitude of this effect varied by season and location. However, each land use supported its own type of butterfly community, as species composition was different across the three land uses. Sugarcane field margins and urban gardens supported populations of butterflies rarely found in our tropical secondary forest sites. Land management practices that encourage forest conservation along with butterfly-friendly activities in human settlements and agricultural areas could improve butterfly conservation. To this end, butterfly conservation in Guyana and other tropical landscapes would benefit from a shift from inadvertently to actively making the landscape attractive for butterflies.

Item ID: 49795
Item Type: Article (Research - C1)
ISSN: 1938-2936
Keywords: Guyana; land use; sugarcane plantation; tropical butterflies; urban
Date Deposited: 08 Aug 2017 00:31
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060208 Terrestrial Ecology @ 25%
05 ENVIRONMENTAL SCIENCES > 0502 Environmental Science and Management > 050202 Conservation and Biodiversity @ 75%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960806 Forest and Woodlands Flora, Fauna and Biodiversity @ 40%
96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960804 Farmland, Arable Cropland and Permanent Cropland Flora, Fauna and Biodiversity @ 60%
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