ADAPTATIONS OF PLANTS TO BURIAL IN COASTAL SAND DUNES
ADAPTATIONS OF PLANTS TO BURIAL IN COASTAL SAND DUNES
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作者：
M. Maun
在海岸和湖泊的前沙丘和海岸线上，最明显的特征之一是经常性的沙埋。不同海岸沙丘系统的埋藏程度不同，影响植物和土壤的物理和生物微环境。沿着海岸的沙丘植物具有许多适应性，以承受埋葬。研究表明，低于一定的埋藏阈值水平，所有前丘植物物种的生长受到刺激，可能是因为多种因素，即改善土壤资源，增加土壤体积，反应性植物生长，增强菌根活性。然而，随着埋葬程度的增加，积极的反应开始下降，直到它成为一个负值。例如，掩埋可能减少种子发芽、幼苗出苗、存活以及幼苗和成年植物的生长。在群落层面上，埋葬作为一种过滤器，有选择地消除了易感物种，减少了耐受性较差的物种的相对丰度，并增加了物种的丰度。
One of the most obvious features on the foredunes and strands of coasts and lakes is recurrent burial in sand. Burial levels vary in different coastal sand dune systems and influence the physical and biotic microenvironment of the plant and soil. Foredune plants along coasts possess numerous adaptations to withstand burial. Studies show that below a certain threshold level of burial, the growth of all foredune plant species is stimulated probably because of multiple factors, namely improved soil resources, increase in soil volume, reactive plant growth, and enhanced mycorrhizal activity. However, as the level of burial increases, the positive response starts to decline until it becomes a negative value. For example, burial may reduce seed germination, seedling emergence, survival, and growth of seedlings and adult plants. At the community level, burial acts as a filter and selectively eliminates susceptible species, reduces the relative abundance of less tolerant species, and increases the abundance of to...