دورية أكاديمية
Modeling population dynamics of solitary bees in relation to habitat quality
العنوان: | Modeling population dynamics of solitary bees in relation to habitat quality |
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المؤلفون: | K. Ulbrich, K. Seidelmann |
المصدر: | Web Ecology, Vol 2, Iss 1, Pp 57-64 (2001) |
بيانات النشر: | Copernicus Publications, 2001. |
سنة النشر: | 2001 |
المجموعة: | LCC:Human ecology. Anthropogeography LCC:Environmental sciences LCC:Oceanography LCC:Science LCC:Biology (General) LCC:Ecology LCC:Microbiology LCC:Physiology LCC:Natural history (General) LCC:General. Including nature conservation, geographical distribution LCC:Zoology LCC:Botany |
مصطلحات موضوعية: | Human ecology. Anthropogeography, GF1-900, Environmental sciences, GE1-350, Oceanography, GC1-1581, Science, Biology (General), QH301-705.5, Ecology, QH540-549.5, Microbiology, QR1-502, Physiology, QP1-981, Natural history (General), QH1-278.5, General. Including nature conservation, geographical distribution, QH1-199.5, Zoology, QL1-991, Botany, QK1-989 |
الوصف: | To understand associations between habitat, individual behaviour, and population development of solitary bees we developed an individual-based model. This model is based on field observations of Osmia rufa (L) (Apoideae: Megachilidae) and describes population dynamics of solitary bees. Model rules are focused on maternal investment, in particular on the female’s individual decisions about sex and size of progeny. In the present paper, we address the effect of habitat quality on population size and sex ratio. We examine how food availability and the risk of parasitism influence long-term population development. It can be shown how population properties result from individual maternal investment which is described as a functional response to fluctuations of environmental conditions. We found that habitat quality can be expressed in terms of cell construction time. This interface factor influences the rate of open cell parasitism as the risk for a brood cell to be parasitized is positively correlated with the time of its construction. Under conditions of scarce food and under resulting long provision times even low parasitism rates lead to a high extinction risk of the population, whereas in rich habitats probabilities of extinction are low even for high rates of parasitism. For a given level of food and parasitism there is an optimum time for cell construction which minimizes the extinction risk of the population. Model results demonstrate that under fluctuating environmental conditions, decreasing habitat quality leads to a decrease in population size but also to rapid shifts in sex ratio. |
نوع الوثيقة: | article |
وصف الملف: | electronic resource |
اللغة: | English |
تدمد: | 2193-3081 1399-1183 |
Relation: | http://www.web-ecol.net/2/57/2001/we-2-57-2001.pdf; https://doaj.org/toc/2193-3081; https://doaj.org/toc/1399-1183 |
DOI: | 10.5194/we-2-57-2001 |
URL الوصول: | https://doaj.org/article/3f85bae786b74292891a6af89c744d81 |
رقم الأكسشن: | edsdoj.3f85bae786b74292891a6af89c744d81 |
قاعدة البيانات: | Directory of Open Access Journals |
تدمد: | 21933081 13991183 |
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DOI: | 10.5194/we-2-57-2001 |