Problems of Hydrology and Plant Distribution in Mires
Problems of Hydrology and Plant Distribution in Mires
复制标题
泥沼中的水文和植物分布问题
DOI:
--
复制
发表时间:
1967
期刊:
影响因子:
--
通讯作者:
H. Ingram
中科院分区:
文献类型:
--
作者:
H. Ingram
The extensive literature of mire ecology contains numerous references to the supposed importance of ground water movement as a factor determining the distribution of mire vegetation. Nevertheless, many accounts refer to it only incidentally and it has seldom received the detailed attention which its frequent mention would seem to demand. This paper is an introductory survey of mire hydrology, regarded as an ecological factor. Various techniques have recently been introduced for the study of water circulation in soils. The most obvious effect of such circulation in mires is to modify their vegetation towards more eutrophic types. Thus, classical views of the relationship between bogs and fens may require revision, because they took too little account of this effect. The paper draws attention to some of the possible mechanisms by which the movement of water through a mire soil may influence plant development. It examines the hypotheses that vertical and horizontal movements may together affect ion transport through the soil and uptake from exchange sites in the peat; that the plants themselves may later redistribute certain ions; and that the availability of nutrient ion species may determine the outcome of interspecific competition during establishment. It also considers the probable interactions between hydrology, the soil atmosphere and plant growth and emphasizes the importance of water tracks as sites for ecological study. The term 'mire' will be employed in the sense of Godwin (1956), and of the Scandinavian phytogeographers, to denote the entire range of deposits of waterlogged peat, together with their drainage systems and vegetation. It will not be used in the restricted sense recently advocated by certain students of Scottish mountain vegetation (McVean & Ratcliffe 1962; Ratcliffe in Burnett 1964). The terms 'blanket bog', 'raised bog' and 'fen' will also be used in the conventional sense (Godwin 1956). Mesotrophic mires, intermediate between fen and bog, will be referred to as 'poor fen'.