Publication Date

4-9-2014

Abstract

Four years after a trench was dug through alpine habitat on Mount Washington, New Hampshire, we surveyed vascular plants, bryophytes, and lichens in the disturbed area, analyzing species richness and abundance compared with values in adjacent, undisturbed areas. Plants had begun recolonizing the disturbed area, but species richness and abundance remained far lower than in the undisturbed community. Among vascular plants, graminoids colonized most quickly, and woody species were largely absent. Species with the highest frequency and greatest abundance in the disturbed area also were common and abundant in the undisturbed community. Bryophytes appeared to be colonizing no more quickly than vascular plants. Treeline and elevation exerted separate effects on community structure and recovery. Treeline influenced species richness, abundance, and the rate of recovery of vascular plants, but there was no evidence of an additional effect of elevation either above or below treeline. Treeline also influenced species richness of bryophytes and lichens. In addition, elevation appeared to have a separate effect on their rate of recovery in alpine habitat: species richness of bryophytes and lichens declined with elevation in the disturbed community but not in the undisturbed community. This suggests that elevation has a transient effect on colonization and/or survival, but only above treeline. In general, recovery has occurred more quickly below treeline. This survey establishes baseline information that will be useful in assessing the rate of recovery after future surveys.

Author Supplied Keywords

alpine plants, disturbance recovery, global climate change, vascular plants, bryophytes, lichens, Presidential Range, White Mountain National Forest, succession

Subjects

Alpine Plants; Bryophytes; Disturbance Recovery; Ecological assessment (Biology); Ecological disturbances; Global Climate Change; Vascular Plants

Publication Information

Rhodora, 2014, Volume 116, Issue 965, 1-24.

© 2014 New England Botanical Club

Archived version is the final published version.

DOI

10.3119/13-01

Peer-Reviewed

Yes

Document Type

Journal Article

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