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Differential effects of environmental climatic variables on parasite abundances in blue tit nests during a decade

Integrative Zoology 2022年第4期17卷 511-529页

作者： Francisco CASTAÑO-VÁZQUEZ Santiago MERINO Evolutionary Ecology Museo Nacional de Ciencias Naturales CSICMadridSpain

Models on climate change have predicted an increase of temperature over the earth’s surface with potential drastic effects on living organisms.We analyzed the relationships between climatic conditions(temperature,rainfall,and wind speed)and the abundance of blood-sucking flying insects(biting midges and blackflies)and nest-dwelling ectoparasites(mites,fleas,and blowflies)collected from blue tit nests during bird breeding seasons for a period of 10 years.Average temperature,rainfall,and wind speed showed significant differences among years.Temperature and wind speed increased during the period of study while rainfall decreased.biting midge,blackfly,and blowfly abundances increased across years but not flea and mite abundances.Hatching date decreased and brood size increased across years.Independently of year variation,parasites were related to climatic variables.For example,biting midge,blowfly,mite,and flea abundances were positive and significantly related to average temperature.We also found a positive and significant relationship between abundances of Haemoproteus infections and biting midge abundances during the first year of life of birds out of nests.However,abundance and prevalence of Lankesterella infections in yearlings were positive and significantly related to mite abundances during the year of birth of birds.Leucocytozoon and Lankesterella infections were also significantly related to climatic variables and Haemoproteus and Lankesterella infections increased across years.In addition,body condition of adult females and males were negatively related to flea larvae and blowfly abundance respectively.Nestling body condition was also negatively related to biting midge abundance.Changes in climatic conditions across years could therefore affect several parasites of birds but also to birds themselves.

关键词： biting midges blackfly blowfly Haemoproteus Lankesterella rainfall temperature

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