Competitive interactions with Aedes albopictus alter the nutrient content of Aedes aegypti

IF 1.6 3区 农林科学 Q2 ENTOMOLOGY
Hunter Deerman, Donald A. Yee
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引用次数: 0

Abstract

Competition is often cited as a central force that affects the distribution and performance of organisms. Ecological stoichiometry is the balance of elements within animal bodies that can be affected by resource acquisition and processing, as well as by intra- or interspecific interactions. Though relatively underexplored for mosquitoes, stoichiometry may provide a wealth of information linking ecological interactions to body nutrient content, and potentially on to pathogen transmission. Detritus, which often varies in nutrient content, forms the base of the food web within the small aquatic habitats occupied by larval mosquitoes, and detrital nutrient content can alter mosquito growth, survival, and population growth. The invasive mosquitoes Aedes albopictus (Diptera: Culicidae) and Aedes aegypti (Diptera: Culicidae) interact as larvae in aquatic systems, often altering their adult populations. Herein, we investigated how different detritus combinations as well as how intra- and interspecific densities of Ae. albopictus and Ae. aegypti would affect coexistence; we also measured how nutrient composition (carbon and nitrogen) and stoichiometry (C:N) of adults would vary with those interactions. Ae. albopictus survival, population growth, and stoichiometry were not affected by intra- or interspecific competition; nutrient values did vary with detritus ratios. However, Ae. aegypti nutrient content and stoichiometry and survival were negatively affected within the lowest nutrient environments in the presence of Ae. albopictus, but in the highest nutrient environments, both species showed high survival rates and population growth. This is the first study to show that adult mosquito body nutrients can be altered by interspecific interactions, and as nutrient content in adults has been linked to pathogen transmission, it provides a novel role of competition in affecting disease dynamics.

Abstract Image

与白纹伊蚊的竞争性相互作用改变了埃及伊蚊的营养成分。
竞争经常被认为是影响生物体分布和性能的核心力量。生态化学计量是动物体内元素的平衡,可能受到资源获取和加工以及种内或种间相互作用的影响。尽管对蚊子的研究相对较少,但化学计量可能提供了大量信息,将生态相互作用与身体营养成分联系起来,并可能与病原体传播联系起来。碎屑的营养成分通常各不相同,在幼虫蚊子占据的小型水生栖息地内形成了食物网的基础,碎屑营养成分可以改变蚊子的生长、生存和种群增长。入侵蚊子白纹伊蚊(双翅目:蚊科)和埃及伊蚊(双翅目:蝇科)作为幼虫在水生系统中相互作用,经常改变它们的成年种群。在此,我们研究了白纹伊蚊和埃及伊蚊的不同碎屑组合以及种内和种间密度如何影响共存;我们还测量了成年人的营养成分(碳和氮)和化学计量(C:N)如何随着这些相互作用而变化。白纹伊蚊的存活、种群增长和化学计量不受种内或种间竞争的影响;营养价值确实随碎屑比例而变化。然而,在白纹伊蚊存在的最低营养环境中,埃及伊蚊的营养成分、化学计量和存活率受到负面影响,但在最高营养环境下,两个物种都表现出较高的存活率和种群增长。这是第一项表明成年蚊子体内营养物质可以通过种间相互作用而改变的研究,由于成年蚊子体内的营养物质含量与病原体传播有关,它在影响疾病动态方面提供了一种新的竞争作用。
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来源期刊
Medical and Veterinary Entomology
Medical and Veterinary Entomology 农林科学-昆虫学
CiteScore
3.70
自引率
5.30%
发文量
65
审稿时长
12-24 weeks
期刊介绍: Medical and Veterinary Entomology is the leading periodical in its field. The Journal covers the biology and control of insects, ticks, mites and other arthropods of medical and veterinary importance. The main strengths of the Journal lie in the fields of: -epidemiology and transmission of vector-borne pathogens changes in vector distribution that have impact on the pathogen transmission- arthropod behaviour and ecology- novel, field evaluated, approaches to biological and chemical control methods- host arthropod interactions. Please note that we do not consider submissions in forensic entomology.
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