Fragoso Gerardo, Spencer Tom
United Nations Environmental Programme-World Conservation Monitoring Centre (UNEP-WCMC), 219 Huntingdon Road, Cambridge CB3 0DL, UK.
Science. 2008 Nov 14;322(5904):1064. doi: 10.1126/science.1159973.
The established paradigm indicates that low-lying marsh production is primarily regulated by submergence and the resulting edaphic conditions. The physical sedimentary environment is in turn deemed to affect production through its effect on marsh-surface elevation relative to sea level. However, our results working with Spartina anglica indicate that production and marsh perennation are controlled by variation in surface level relative to the plant's meristematic base and not hindered by prolonged submergence. These findings suggest that plant responses to changes in sedimentary conditions determine marsh development and survival in the short term, independently of long-term changes in relative sea level.
既定范式表明，低洼沼泽的生产力主要受淹没及由此产生的土壤条件调节。反过来，物理沉积环境被认为通过其对沼泽表面相对于海平面的高度的影响来影响生产力。然而，我们对大米草的研究结果表明，生产力和沼泽多年生植物受相对于植物分生组织基部的表面高度变化控制，而不会因长期淹没而受到阻碍。这些发现表明，短期内，植物对沉积条件变化的反应决定了沼泽的发育和生存，而与相对海平面的长期变化无关。
