INTERSPECIFIC ASSOCIATIONS IN DIFFERENT SUCCESSIONA L STAGES OF BRACHYPODIUM PINNATUM GRASSLAND AFTER DEFORESTATION IN HUNGARY
INTERSPECIFIC ASSOCIATIONS IN DIFFERENT SUCCESSIONA L STAGES OF BRACHYPODIUM PINNATUM GRASSLAND AFTER DEFORESTATION IN HUNGARY
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
K. Virágh;S. Bartha
中科院分区：
文献类型：
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作者：
K. Virágh;S. Bartha
在匈牙利中央山脉和匈牙利大平原的交界处，毛叶短柄栎属植物是其草本层的主要成分。在匈牙利，青冈草原具有非常高的多样性和自然保护价值，因为它们保留了原始森林草原植物的许多元素。在毁林后的次生演替过程中，旱生蕨类群落逐渐发展成为旱生草地。研究了3个次生演替阶段不同演替阶段的羽绒草群落的空间组织和组成分化。在20×110个连续的5×5 cm微样地网格中检测物种的存在和不存在，并用信息统计ICS进行分析。早期阶段以MES物种联盟为特征。旱生和中生草类在演替中期形成联合体，但在演替后期被隔离。但在物种更替过程中，物种更替呈弥漫性和渐进性。
At the border of the Hungarian Central Mountain Ran ge and the Hungarian Great Plain Brachypodium pinnatum is a dominant component of the herb layer of Quercus pubescens oakwood. In Hungary, Brachypodium grasslands are of very high diversity and natural conservation value because they preserve many elements of the or iginal forest-steppe flora. During the secondary succession after deforestation xeromesophilous Brachypodium pinnatum community develops and gradually turns into xerophilous grasslands. Spatial organization and compositional differentiat ion of Brachypodium pinnatum communities were studied in three stands representing their ea rly, middle, and late secondary successional phases. Presence/absence of species were detected i n 20×110 grids of contiguous 5×5 cm microquadrats, and analysed by using information statist ics. Early phase was characterized by a coalition of mes ic species. Xeric and mesic grasses formed coalition in the middle phase but they were segrega ted in the late successional phase. However, the pattern of species replacement was diffuse and grad ual during the transformation process.