An empirical test of the aggregation model of coexistence and consequences for competing container-dwelling mosquitoes.
نویسندگان
چکیده
We investigated the aggregation model of coexistence as a potential mechanism explaining patterns of coexistence between container mosquitoes Aedes albopictus and Aedes aegypti in southern Florida, USA. Aedes aegypti coexists with the invasive A. albopictus in many locations despite being an inferior resource competitor under most conditions. In agreement with aggregation theory we observed significant intraspecific aggregation of A. albopictus in all six field sites sampled in southern Florida in 2009. Quantitative results suggest that larval distributions of A. albopictus across containers are sufficiently aggregated to permit persistence of the inferior competitor A. aegypti. We tested whether observed levels of A. albopictus aggregation would significantly improve A. aegypti population performance in a controlled laboratory competition experiment manipulating A. albopictus aggregation while holding mean densities constant. We quantified A. aegypti's estimated rate of population change for replicate, multi-container cohorts in response to increasing A. albopictus aggregation across the cohorts. Aedes albopictus aggregation treatments produced J statistics for aggregation that spanned the range observed in the field study. We demonstrate a positive linear relationship between intraspecific aggregation of the superior competitor A. albopictus and estimated rate of population change for cohorts of the inferior A. aegypti. Thus, aggregation of A. albopictus at levels comparable to those observed in nature appears to be sufficient to reduce significantly the competitive impact of A. albopictus on multi-container cohorts of A. aegypti, and may therefore contribute to local coexistence of these competitors.
منابع مشابه
توالی معنادار فعالیتها در مسکن، مطالعۀ موردی ایل قشقایی
Sequence of activities has evident and objective aspects in the people living environment that depend on subjective and meaningful aspects in their culture and lifestyle. The sequence of activities with two forms of "spatial and temporal", are ways of separation or aggregation of activities in different cultures dwelling, which lie at the origin of the formation of behaviour settings. The theor...
متن کاملA model to predict evaporation rates in habitats used by container-dwelling mosquitoes.
Container-dwelling mosquitoes use a wide variety of container habitats. The bottle cap is often cited as the smallest container habitat used by container species. When containers are small, the habitat conditions can greatly affect evaporation rates that in turn can affect the species dynamics within the container. An evaporation rate model was adapted to predict evaporation rates in mosquito c...
متن کاملInfluence of leaf detritus type on production and longevity of container-breeding mosquitoes.
Freshwater ecosystems are positioned at low levels in the landscape and receive large inputs of diverse plant-based detritus, a major source of energy for consumers in aquatic ecosystems. We conducted field experiments in Urbana, IL to determine the independent and combined effects of leaves of common tree species including the northern red oak (Quercus rubra L.), sugar maple (Acer saccharum M...
متن کاملIntroduction to Competing Risk Model In the Epidemiological Research
Background and aims: Chronic kidney disease (CKD) is a public health challenge worldwide, with adverse consequences of kidney failure, cardiovascular disease (CVD), and premature death. Chronic kidney disease leads to the end stage of renal disease (ESRD), if late/not diagnosed. Competing risk modeling is a major issue in Epidemiology research. In Epidemiology study, sometimes inappropriate met...
متن کاملSolving Dock Allocation Problem Using Improved Chemical Reaction Algorithm
Container terminals are places where cargo is transported from point to point using special equipment. One of the most important issues in planning coastal operations at container terminals is the issue of the planning of the embankment or quay, which has a significant impact on crane, yard, warehouse and truck routing programs. This research involved a basin planning model with a multi-pier si...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- Ecology
دوره 94 2 شماره
صفحات -
تاریخ انتشار 2013