Has water limited our imagination for aridland biogeochemistry?

被引：176

作者：

Austin, Amy T. ^{[1
]}

机构：

[1] Univ Buenos Aires, Inst Invest Ecol & Fisiol Vinculadas Agr IFEVA CO, Fac Agron, RA-1053 Buenos Aires, DF, Argentina

来源：

TRENDS IN ECOLOGY & EVOLUTION | 2011年 / 26卷 / 05期

关键词：

PLANT LITTER DECOMPOSITION; PRECIPITATION PULSES; NITROGEN DYNAMICS; SONORAN DESERT; ULTRAVIOLET-RADIATION; SHRUB ENCROACHMENT; VEGETATION TYPES; SOIL-NITROGEN; B RADIATION; CARBON;

D O I：

10.1016/j.tree.2011.02.003

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

The classic ecological paradigm for deserts, that all processes are controlled by water availability, has limited our imagination for exploring other controls on the cycling of carbon and nutrients in aridland ecosystems. This review of recent studies identifies alternative mechanisms that challenge the idea that all soil processes in aridlands are proximately water-limited, and highlights the significance of photodegradation of aboveground litter and the overriding importance of spatial heterogeneity as a modulator of biotic responses to water availability. Aridlands currently occupy >30% of the terrestrial land surface and are expanding. It is therefore critical to incorporate these previously unappreciated mechanisms in our understanding of aridland biogeochemistry to mitigate the effects of desertification and global change.

引用

收藏

页码：229 / 235

页数：7

相关论文

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