Reduced hornbill abundance associated with low seed arrival and altered recruitment in a hunted and logged tropical forest

PloS One
Rohit NaniwadekarAparajita Datta

Abstract

Logging and hunting are two key direct threats to the survival of wildlife in the tropics, and also disrupt important ecosystem processes. We investigated the impacts of these two factors on the different stages of the seed dispersal cycle, including abundance of plants and their dispersers and dispersal of seeds and recruitment, in a tropical forest in north-east India. We focused on hornbills, which are important seed dispersers in these forests, and their food tree species. We compared abundances of hornbill food tree species in a site with high logging and hunting pressures (heavily disturbed) with a site that had no logging and relatively low levels of hunting (less disturbed) to understand logging impacts on hornbill food tree abundance. We compared hornbill abundances across these two sites. We, then, compared the scatter-dispersed seed arrival of five large-seeded tree species and the recruitment of four of those species. Abundances of hornbill food trees that are preferentially targeted by logging were two times higher in the less disturbed site as compared to the heavily disturbed site while that of hornbills was 22 times higher. The arrival of scatter-dispersed seeds was seven times higher in the less disturbed site....Continue Reading

References

Feb 15, 2007·Conservation Biology : the Journal of the Society for Conservation Biology·Pierre-Michel Forget, Patrick A Jansen
Feb 15, 2007·Conservation Biology : the Journal of the Society for Conservation Biology·Michael A GrayJane K Hill
Feb 5, 2008·Conservation Biology : the Journal of the Society for Conservation Biology·Jasper Mbae KirikaKatrin Böhning-Gaese
Jul 1, 2008·Ecology·John TerborghC E Timothy Paine
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Citations

May 8, 2019·The Journal of Animal Ecology·Rohit NaniwadekarHari Sridhar
Mar 12, 2021·Scientific Reports·Ankit VikrantAparajita Datta

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Software Mentioned

R Language
lme4
MASS

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