Vegetative and floral phenology of three mangroves in Mgeni Estuary
Vegetative and floral phenology of three mangroves in Mgeni Estuary
复制标题
姆格尼河口三种红树林的植物和花卉物候
DOI：
10.1016/s0254-6299(16)31337-0
复制
发表时间：
1988
影响因子：
3.1
通讯作者：
T. Steinke
中科院分区：
文献类型：
--
作者：
T. Steinke
对木榄（Bruguiera gymnorrhiza（L.）拉姆，Rhizophora mucronata（Lam.）和白骨壤Avicennia marina（Forssk.）维尔在姆盖尼河口在B.裸地、半阴地和阴地的出叶率在较暖的月份表现出较高的值，在较冷的月份表现出较低的值。虽然叶片脱落没有表现出明显的趋势，在叶片出现的情况下，值一般较低，在较冷（也干燥）的月份。在所有上述光照条件下，叶/枝的数量在5年的观察期内呈下降趋势。然而，叶片寿命受到暴露的影响，阳光，半阴和阴叶的平均寿命分别为89.3，103.1和141.8周。繁殖体的最高数量承担在阳光下的芽，没有在阴影中产生，而中间的数量被发现在半阴。INR。mucronata，叶片出现和脱落的数据显示出类似的趋势，获得的B。在4年的观察期间，叶/枝的数量增加。叶片寿命平均为99.4周，比Rhizophoraspp长。以前的工人。观察不得不缩短。marina的叶片出现的双峰模式，只有在冬季叶片脱落的数字较低。叶片寿命平均为56.4周，与其他工人的结果相比很好。被认为是这些结果的凋落物的生产和降解的意义。
Vegetative and floral phenological observations were conducted onBruguiera gymnorrhiza(L.) Lam.,Rhizophora mucronata(Lam.) andAvicennia marina(Forssk.) Vierh. in Mgeni Estuary. In shoots ofB. gymnorrhizain the sun, semi-shade and shade, leaf emergence showed high values in the warmer months with low values in the cooler period of the year. Although leaf abscission did not show clear trends as in the case of leaf emergence, values were generally lower during the cooler (and also dry) months. In all of the above light regimes the number of leaves/shoots showed a decrease over the 5-year period of the observations. However, longevity of leaves was influenced by exposure, with sun, semi-shade and shade leaves having a mean lifetime of 89,3; 103,1 and 141,8 weeks respectively. Highest numbers of propagules were borne on shoots in the sun, none was produced in the shade, while an intermediate number was found in semi-shade. InR. mucronata,data for leaf emergence and abscission showed similar trends to those obtained forB. gymnorrhiza.The number of leaves/shoots increased during the 4 years of observations. Leaf longevity averaged 99,4 weeks which was longer than obtained forRhizophoraspp. by previous workers. Observations had to be curtailed onA. marinawhich revealed a bimodal leaf emergence pattern with low figures for leaf abscission only in the winter months. Leaf longevity averaged 56,4 weeks which compared well with results from other workers. The significance of these results for litter production and degradation is considered.