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Effects of ice storm on species richness and abundance of resident birds in subtropical forest in southern China

Integrative Zoology 2020年第6期15卷 522-532页

作者： Myung-Bok LEE Yongmi HONG Zufei SHU Qiang ZHANG Fasheng ZOU Guangdong Key Laboratory of Animal Conservation and Resource Utilization Guangdong Public Laboratory of Wild Animal Conservation and UtilizationGuangdong Institute of Applied Biological ResourcesGuangzhouChina Guangdong Chebaling National Nature Reserve ShixingChina

Between January and February 2008,a severe ice storm occurred in southern *** storm damaged nearly 21 million hectares of forest lands with broken branch,trunk breakage,and stem bending of many *** natural disturbance provides a unique opportunity to study impacts of extreme climatic event on forest *** hierarchical multi-species occupancy model(species richness;27 species)and N-mixture model(abundance;3 species),we investigated how the storm affected resident bird species in subtropical forest in southern *** sampled birds at Chebaling National Nature Reserve in Guangdong Province,monthly for 1 year each before and after the storm by mist *** take into account variations in temperature between years and between months,we incorporated monthly mean temperature into the models as an additional *** species richness was greater before the *** species richness(from the hierarchical model)also tended to be greater before than after the storm although 95%Bayesian credible intervals of these estimates were *** showed a negative effect on estimated species richness,indicating greater species richness during *** three species captured the most,abundance of Chestnut Bulbul(Hemixos castanonotus)significantly decreased after the *** two species,Grey Treepie(Dendrocitta formosae)and Huet’s Fulvetta(Alcippe hueti)showed insignificant responses to the *** study indicates that the 2008 ice storm may not have a significant impact on species richness of resident birds in subtropical forest;however,the effect can be species-specific and negative to some species’population.

关键词： abundance forest birds hierarchical model ice storm species richness

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Invasive rats strengthen predation pressure on bird eggs in a South Pacific island rainforest

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Current Zoology 2017年第6期63卷 583-590页

作者： Quiterie DURON Edouard BOURGUET Helene DE MERINGO Alexandre MILLON Eric VIDAL Institut Mediterraneen de Biodiversite et d'Ecologie Marine et Continentale (IMBE) Aix Marseille Universite CNRS IRD Avignon Universite Centre IRD Noumea - BP A5 98848 Noumea Cedex Nouvelle-Caledonie France Institut Mediterraneen de Biodiversite et d'Ecologie Marine et Continentale (IMBE) Aix Marseille Universite CNRS IRD Avignon Universite Technopole Arbois-Mediterranee Bat. Villemin - BP 80 F-13545 Aix-en-Provence cedex 04 France

Invasive rats （Rattus spp.） are known to have pervasive impacts on island birds, particularly on their nesting success. To conserve or restore bird populations, numerous invasive rat control or eradication projects are undertaken on islands worldwide. However, such projects represent a huge investment and the decision-making process requires proper assessment of rat impacts. Here, we assessed the influence of two sympatric invasive rats （Rattus rattus and R. exulans） on native bird eggs in a New Caledonian rainforest, using artificial bird-nest monitoring. A total of 178 artificial nests containing two eggs of three different sizes were placed either on the ground or 1.5 m high and monitored at the start of the birds＇ breeding season. Overall, 12.4% of the nests were depredated during the first 7 days. At site 1, where nests were monitored during 16 days, 41.8% of the nests were depredated. The main predator was the native crow Corvus moneduloides, responsible for 62.9% of the overall predation events. Rats were responsible for only 22.9% of the events, and ate only small and medium eggs at both heights. Our experiment suggests that in New Caledonia, predation pressure by rats strengthens overall bird-nest predation, adding to that by native predators, Experimental rat control operations may allow reduced predation pressure on nests as well as the recording of biodiversity responses after rat population reduction.

关键词： bird-nest predation forest birds invasive rodents island conservation rat management.

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