Ecological thresholds under atmospheric nitrogen deposition for 1200 herbaceous species and 24 communities across the United States.

ABSTRACT: Nitrogen (N) emissions and atmospheric deposition have increased significantly during the last century and become a stressor for many N-sensitive plant species. Understanding individual and community herbaceous plant species thresholds to atmospheric N deposition can inform emissions reduction policy. Here, we present results using Threshold Indicator Taxa Analysis (TITAN) applied to more than 1200 unique plant species and 24 vegetation communities (i.e., alliances) across the United States (US) to assess vulnerability to N deposition. Alliance-level thresholds (change points) for species decreasing in abundance along the gradient ranged from 1.8 to 14.3 kg N ha^─1  year^─1 and tended to be lower in the west than the east, which suggests that eastern communities, where

SUBMITTER: Wilkins K 

PROVIDER: S-EPMC9770646 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature