000			030420000a22004090004500
911			_aXL1996502628
901			_aF40
903			_aV
904			_aBCO
905			_aC
906			_a19960101
908			_aJ
909			_aAS
912			_aEn
912			_aEn
914			_aBCO1
914			_aINFOR
914			_aBN
082	0	4	_a24714
100	1		_962177 _aDenslow, J.S.
260			_c1980
041	0		_aEn
500			_aSum. (En)
520			_aI suggest that between-community variations in diversity patterns during succession in plant communities are due to the effects of selection on life history strategies under different disturbance regimes. Natural disturbances to plant communities are simultaneously a source of mortality for some individuals and a source of establishment sites for others. The plant community consists of a mosaic of disturbance patches (gaps) of different environmental conditions. The composition of the mosaic is described by the size-frequency distribution of the gaps and is dependent on the rates and scales of disturbance. The life-history strategies of plant species dependent on some form of disturbance for establishment of propagules should reflect this size-frequency distribution of disturbance patches. An extension of island biogeographic theory to encompass relative habitat area predicts that a community should be most rich in species adapted to growth and establishment in the spatially most common patch types. Changes in species diversity during succession following large scale disturbance reflect the prevalent life history patterns under historically common disturbance regimes. Communities in which the greatest patch area is in large-scale clearings (e.g. following fire) are most diverse in species establishing seedlings in xeric, high light conditions. Species diversity decreases during succesion. Communities in which such large patches are rare are characterized by a large number of species that reach the canopy through small gaps and relatively few which regenerate in the large clearings. Diversity increases during succession following a large scale disturbance. Evidence from communities characterized by different disturbance regimes is summarized from the literature. This hypothesis provides an evolutionary mechanism with which to examine the changes in plant community structure during succession. Diversity peaks occurring at "intermediate levels" of disturbance as discussed by Connell and Huston are interpreted in this context.
650	1	4	_9144490 _aDINAMICA DE LA POBLACION
650	1	4	_9140644 _aCLAROS
650	1	4	_9144885 _aDOSEL
650	1	4	_9165549 _aSUCESION ECOLOGICA
650	1	4	_9138276 _aBOSQUE NATURAL
691			_9315958 _aECOLOGICAL SUCCESSION
692			_aSUCCESSION ECOLOGIQUE
773	0		_tOecologia (Alemania) _d1980 _gv. 46 p. 18-21
040			_aCR-TuBCO _cCR-TuBCO _bEs
245	1	0	_aPatterns of plant species diversity during succesion under different disturbance regimes
942			_cANA
003			CR-TuBCO
999			_c58194 _d58194