The effect of propagule size on the invasion of an alien insect
نویسندگان
چکیده
J. MEMMOTT*†, P. G. CRAZE‡, H. M. HARMAN§, P. SYRETT¶ and S. V. FOWLER¶ * School of Biological Sciences, Woodland Road, Bristol BS8 1UG, United Kingdom; † The Leverhulme Unit, NERC Centre for Population Biology, Imperial College at Silwood Park, Ascot, Berkshire SL5 7PY; ‡ School of Biological Sciences, University of Plymouth, Plymouth, Drake Circus PL4 8AA, UK; § Landcare Research, Private Bag 92170, Auckland, New Zealand; and ¶ Landcare Research, PO Box 69, Lincoln, New Zealand
منابع مشابه
Timing and propagule size of invasion determine its success by a time-varying threshold of demographic regime shift.
Theory of invasion ecology indicates that the number of invading individuals (propagule size) and the timing of invasion are important for invasion success. Propagule size affects establishment success due to an Allee effect and the effect of demographic stochasticity, whereas the timing of invasion does so via niche opportunity produced by fluctuating predation pressure and resource abundance....
متن کاملNative and alien plant species inventory and diversity in disturbed forests and its economic value
The study was conducted to assess the native and alien plant species in one of the highly disturbed forest (S1) and less disturbed forest (S2) in Mt. Manunggal, Cebu Island, Philippines. Twenty-four quadrats with a size of 20mx20 m were established using a quadrat sampling technique to identify and record all plant species. Diversity indices were utilized to determine species abundance, richnes...
متن کاملPlanting intensity, residence time, and species traits determine invasion success of alien woody species.
We studied the relative importance of residence time, propagule pressure, and species traits in three stages of invasion of alien woody plants cultivated for about 150 years in the Czech Republic, Central Europe. The probability of escape from cultivation, naturalization, and invasion was assessed using classification trees. We compared 109 escaped-not-escaped congeneric pairs, 44 naturalized-n...
متن کاملModeling invasive alien plant species in river systems: Interaction with native ecosystem engineers and effects on hydro-morphodynamic processes
Invasive alien plant species negatively impact native plant communities by out-competing species or changing abiotic and biotic conditions in their introduced range. River systems are especially vulnerable to biological invasions, because waterways can function as invasion corridors. Understanding interactions of invasive and native species and their combined effects on river dynamics is essent...
متن کاملEvaluating Hypotheses of Plant Species Invasions on Mediterranean Islands: Inverse Patterns between Alien and Endemic Species
Invasive alien species cause major changes to ecosystem functioning and patterns of biodiversity, and the main factors involved in invasion success remain contested. Using the Mediterranean island of Crete, Greece as a case study, we suggest a framework for analyzing spatial data of alien species distributions, based on environmental predictors, aiming to gain an understanding of their spatial ...
متن کامل