HABITAT PARTITIONING AND COMPETITIVE DISPLACEMENT IN CATTAILS (TYPHA) - EXPERIMENTAL FIELD STUDIES
HABITAT PARTITIONING AND COMPETITIVE DISPLACEMENT IN CATTAILS (TYPHA) - EXPERIMENTAL FIELD STUDIES
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DOI：
10.1086/283841
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发表时间：
1981-01-01
影响因子：
2.9
通讯作者：
WETZEL, RG
中科院分区：
文献类型：
--
作者：
GRACE, JB;WETZEL, RG
水生植物T. latifolia和T.沙枣和沙枣的分离沿着水深增加的梯度，T.宽叶局限于15厘米的深度< 80 cm and T. angustifolia to depths >。在没有竞争对手的情况下，两个物种沿着梯度移植表明，T。latifolia受T. angustifolia和T.沙枣能够在整个梯度上生长。竞争前分布的损失对T. latifolia，而T.狭叶重叠减少了43.5%，在生长季节的过程中。根茎移植到自然林分未能生存，进一步表明，竞争是积极运作，以保持物种之间的地带性。栖息地划分的基础似乎是一个形态上的差异，即T。阔叶树在深水中生长受到阻碍，因为生产更宽的叶子的成本更高，但在浅水中能够更好地竞争光线，因为它的叶表面积更大。共存主要是竞争力差的T的深水避难所。但也可能涉及其他因素。
The aquatic plants T. latifolia and T. angustifolia are strongly segregated along a gradient of increasing water depth with T. latifolia restricted to depths of < 80 cm and T. angustifolia to depths > 15 cm. Transplantation of both species along the gradient in the absence of competitors showed that T. latifolia was little affected by the presence of T. angustifolia but T. angustifolia was capable of growing over the entire gradient. The loss of precompetitive distribution was not statistically significant for T. latifolia compared to a 39.6% loss for T. angustifolia. Overlap was reduced by 43.5% during the course of the growing season. Rhizomes transplanted into natural stands failed to survive, further demonstrating that competition was actively operating to maintain zonation between species. The basis for habitat partitioning appears to be a difference in morphology whereby T. latifolia was prevented from growing in deep water because of the higher cost of producing broader leaves but better able to compete for light in shallow water because of its greater leaf surface area. Coexistence is largely the result of a deep-water refuge for the competitively inferior T. angustifolia although other factors may be involved.