Species pools, community completeness and invasion: disentangling diversity effects on the establishment of native and alien species

被引:27
作者
Bennett, Jonathan A. [1 ,2 ]
Riibak, Kersti [1 ]
Kook, Ene [1 ]
Reier, Ulle [1 ]
Tamme, Riin [1 ,3 ]
Bueno, C. Guillermo [1 ]
Partel, Meelis [1 ]
机构
[1] Univ Tartu, Inst Ecol & Earth Sci, Dept Bot, Lai 40, EE-51005 Tartu, Estonia
[2] Univ British Columbia, Dept Biol, Okanagan Campus, Kelowna, BC V1V 1V, Canada
[3] Univ New S Wales, Sch Biol Earth & Environm Sci, Evolut & Ecol Res Ctr, Sydney, NSW 2052, Australia
关键词
Alpha diversity; biotic resistance; competition; dark diversity; disturbance; exotic species; gamma diversity; invasibility; regional processes; structural equation modelling; BIOTIC RESISTANCE; PLANT INVASIONS; DARK DIVERSITY; INVASIBILITY; PRODUCTIVITY; COMPETITION; RICHNESS; ORIGIN; SIZE; DISPERSAL;
D O I
10.1111/ele.12702
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Invasion should decline with species richness, yet the relationship is inconsistent. Species richness, however, is a product of species pool size and biotic filtering. Invasion may increase with richness if large species pools represent weaker environmental filters. Measuring species pool size and the proportion realised locally (completeness) may clarify diversity-invasion relationships by separating environmental and biotic effects, especially if species' life-history stage and origin are accounted for. To test these relationships, we added seeds and transplants of 15 native and alien species into 29 grasslands. Species pool size and completeness explained more variation in invasion than richness alone. Although results varied between native and alien species, seed establishment and biotic resistance to transplants increased with species pool size, whereas transplant growth and biotic resistance to seeds increased with completeness. Consequently, species pools and completeness represent multiple independent processes affecting invasion; accounting for these processes improves our understanding of invasion.
引用
收藏
页码:1496 / 1505
页数:10
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