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作 者 ：王文卿,林鹏

期 刊 ：生态学报 2001年 21卷 8期 页码：1233~1238

关键词：红树林；秋茄；红海榄；叶片；元素；季节动态；

Keywords:mangroves, Kandelia candel, Rhizophora stylosa, leaf, element, seasonal dynamics,

摘 要 ：研究了福建九龙江口秋茄 (Kandelia candel L.)和红海榄 (Rhizophora stylosa G.)成熟叶片 N、P、K、Na、Ca、Mg和Cl等元素含量的季节变化和元素间的关系。结果表明秋茄和红海榄同为红树科树种 ,生境相同且同属拒盐植物 ,但在元素积累及季节变化模式上存在较大差别。秋茄和红海榄叶片高盐分和 Ca含量及低 K/Na比 ,这是它们对盐渍生境的一种适应。秋茄无机渗透调节剂 (主要指 K+、Na+、Ca2 +、Mg2 +和 Cl- )含量夏季高于冬季 ,而红海榄与之完全相反。秋茄能够通过主动积累有机渗透调节剂来适应低温 ,而红海榄不能。对秋茄和红海榄抗寒机制进行了讨论。

Abstract:The seasonal changes of N, P, K, Na, Ca, Mg and Cl concentrations in the mature leaves of Kandelia candel L Druce and Rhizophora stylosa Griff at Jiulongjiang estuary were studied in the resent study, and the relationships among elements were discussed Although K candel and R stylosa all belong to Rhizophoraceae and salt exclusion types and occur on the same habitat, they were different in the patterns in terms of element accumulation and seasonal changes The leaves of K ...

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