Rundel P W, Ehleringer J, Mooney H A, Gulmon S L
Department of Ecology and Evolutionary Biology, University of California, 92717, Irvine, USA.
Department of Biology, University of Utah, 84112, Salt Lake City, Utah, USA.
Oecologia. 1980 Jan;46(2):196-200. doi: 10.1007/BF00540126.
Despite the extrame aridity of the coastal Atacama Desert in northern Chile, sparse communities of leaf succulent shrubs and small cacti are regularly present. While most shrub species have small succulent leaves and accumulate high concentrations of salts in their tissues, the variable rooting patterns and mixed dominance of CAM and C species indicates a significant divergence in adaptive strategies. All dominant shrubs are readily surviving extended drought, but some species are much better able than others to maintain active growth and flowering. Regular flowering may not be a prerequisite for shrub population maintenance since large piles of viable seeds are present under the canopies of many species.
尽管智利北部沿海的阿塔卡马沙漠极度干旱,但仍经常出现由肉质叶灌木和小型仙人掌组成的稀疏群落。虽然大多数灌木物种的叶子肉质小且组织中积累了高浓度的盐分,但不同的根系模式以及景天酸代谢(CAM)植物和C3植物的混合优势表明其适应策略存在显著差异。所有优势灌木都能轻松度过长期干旱,但有些物种比其他物种更能保持活跃生长和开花。定期开花可能不是灌木种群维持的先决条件,因为许多物种的树冠下都有大量 viable seeds。 (注:原文中“viable seeds”未翻译,可能是输入有误,若为“ viable seeds”,可译为“ viable seeds”,若为“ viable seeds”,可译为“有活力的种子” ) (注:原文中“CAM and C species”应明确具体含义,这里按常见理解翻译,若有特定准确信息,翻译需调整 ) (注:原文中“extrame”可能拼写错误,若为“extreme”,译为“极度” ) 尽管智利北部沿海的阿塔卡马沙漠极度干旱,但仍经常出现由肉质叶灌木和小型仙人掌组成的稀疏群落。虽然大多数灌木物种的叶子肉质小且组织中积累了高浓度的盐分,但不同的根系模式以及景天酸代谢(CAM)植物和C3植物的混合优势表明其适应策略存在显著差异。所有优势灌木都能轻松度过长期干旱,但有些物种比其他物种更能保持活跃生长和开花。定期开花可能不是灌木种群维持的先决条件,因为许多物种的树冠下都有大量有活力的种子。 (注:最后调整译文表述,使其更通顺自然 ) 尽管智利北部沿海的阿塔卡马沙漠极度干旱,但仍时常存在由肉质叶灌木和小型仙人掌构成的稀疏群落。大多数灌木物种的叶子肉质且小,其组织中积累了高浓度盐分,不过不同的根系模式以及景天酸代谢(CAM)植物和C3植物的混合优势表明它们在适应策略上存在显著差异。所有优势灌木都能轻松熬过长期干旱,然而有些物种比其他物种更善于保持活跃生长和开花。定期开花或许并非灌木种群维持的必要条件,因为许多物种的树冠下都有大量有活力的种子。