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100			_aMiller, Hannah R _950652
245			_aBiogeomorphic feedbacks and the ecosystem engineering of recently deglaciated terrain/
260			_bSage, _c2019.
300			_aVol 43, issue 1, 2019 : (24-45 p.).
520			_aMatthews’ 1992 geoecological model of vegetation succession within glacial forefields describes how following deglaciation the landscape evolves over time as the result of both biotic and abiotic factors, with the importance of each depending on the level of environmental stress within the system. We focus in this paper on how new understandings of abiotic factors and the potential for biogeomorphic feedbacks between abiotic and biotic factors makes further development of this model important. Disturbance and water dynamics are two abiotic factors that have been shown to create stress gradients that can drive early ecosystem succession. The subsequent establishment of microbial communities and vegetation can then result in biogeomorphic feedbacks via ecosystem engineering that influence the role of disturbance and water dynamics within the system. Microbes can act as ecosystem engineers by supplying nutrients (via remineralization of organic matter and nitrogen fixation), enhancing soil development, either decreasing (encouraging weathering) or increasing (binding sediment grains) geomorphic stability, and helping retain soil moisture. Vegetation can act as an ecosystem engineer by fixing nitrogen, enhancing soil development, modifying microbial community structure, creating seed banks, and increasing geomorphic stability. The feedbacks between vegetation and water dynamics in glacial forefields are still poorly studied. We propose a synthesized model of ecosystem succession within glacial forefields that combines Matthews’ initial geoecological model and Corenblit's model to illustrate how gradients in environmental stress combined with successional time drive the balance between abiotic and biotic factors and ultimately determine the successional stage and potential for biogeomorphic feedbacks.
650			_a Vegetation, _950653
650			_a microbes, _950654
650			_aAlpine, _950655
650			_a biogeomorphic feedbacks, _950656
650			_a glacial forefields, _950657
650			_asuccession _950658
700			_aLane, Stuart N _950659
773	0		_012665 _916502 _dLondon: Sage Publication Ltd, 2019. _tProgress in Physical Geography: Earth and Environment/ _x03091333
856			_uhttps://doi.org/10.1177/0309133318816536
942			_2ddc _cART
999			_c12667 _d12667