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island biogeography theory and the habitat heterogeneity jointly explain global patterns of Rhododendron diversity

Plant Diversity 2024年第5期46卷 565-574页

作者： Yanwei Guan Yongru Wu Zheng Cao Zhifeng Wu Fangyuan Yu Haibin Yu Tiejun Wang School of Geographical Sciences and Remote Sensing Guangzhou UniversityGuangzhou 510006China School of Life Sciences Guangzhou UniversityGuangzhou 510006China Department of Natural Resources Faculty of Geo-Information and Earth Observation(ITC)University of TwenteDrienerlolaan 5Enschede 7522 NBthe Netherlands

Mountain biodiversity is of great importance to biogeography and ***,it is unclear what ecological and evolutionary processes best explain the generation and maintenance of its high levels of species *** this study,we determined which of six common hypotheses(e.g.,climate hypotheses,habitat heterogeneity hypothesis and island biogeography theory)best explain global patterns of species diversity in *** found that Rhododendron diversity patterns were most strongly explained by proxies of island biogeography theory(i.e.,mountain area)and habitat heterogeneity(i.e.,elevation range).When we examined other relationships important to island biogeography theory,we found that the planimetric area and the volume of mountains were positively correlated with the Rhododendron diversity,whereas the‘mountains-to-mainland’distance was negatively correlated with Rhododendron diversity and shared *** findings demonstrate that Rhododendron diversity can be explained by island biogeography theory and habitat heterogeneity,and mountains can be regarded as islands which supported island biogeography theory.

关键词： Mountain biodiversity Rhododendron island biogeography theory Habitat heterogeneity Biogeographical hypotheses Plant diversity

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Prickly pairs: the proportion of spinescent species does not differ between islands and mainlands

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Journal of Plant Ecology 2019年第6期12卷 941-948页

作者： Floret L.Meredith Marianne L.Tindall Frank A.Hemmings Angela T.Moles Evolution and Ecology Research Centre School of BiologicalEarth and Environmental SciencesUNSW AustraliaSydneyNSW 2052Australia John T.Waterhouse Herbarium School of BiologyEarth and Environmental SciencesUNSW AustraliaSydneyNSW 2052Australia

Aims Organisms on islands are thought to escape biotic pressure and lose defensive ***,broadscale,evidence-based tests of this idea are *** this study,we asked:(i)whether the proportion of spinescent plant species differed between islands and mainlands and(ii)whether the proportion of spinescent species increased with increasing island area and with decreasing island distance to *** We compiled species lists for 18 island–mainland pairs around *** classified 1129 plant species as spinescent or nonspinescent using published species *** Findings There was no significant difference between the proportion of spinescent species found on islands and on *** of spinescent species were not significantly related to island area or distance to *** results suggest that spinescence is just as important to island plants as it is to mainland plants,even for plants inhabiting small or distal *** is unexpected,given prevailing thought and previous work on island–mainland *** study demonstrates the importance of testing well-accepted yet untested ideas.

关键词： herbivory island biogeography theory physical defence plant community plant defence prickles thorns

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