Importance of flood irrigation for foraging colonial waterbirds
نویسندگان
چکیده
For a colonial-nesting bird, like the white-faced ibis (Plegadis chihi), landscape surrounding breeding colony can be important. White-faced must rely on areas outside their for foraging, but this part of life history has received little attention, and management even less so. To address knowledge gap, we conducted road-based driving surveys randomly selected, spatially balanced sample survey agricultural fields within 22-km radius 2 largest colonies in Idaho, USA: Market Lake Wildlife Management Area Mud Area. Our study took place 2012 primary objective was to quantify patterns foraging habitat use marsh-nesting species, particularly associations with specific irrigation practices crop types. We documented majority birds flood-irrigated wheel-line sprinkler-irrigated (76%) natural wetlands (13%), which were limited our area (3% land cover). Even though 70% included center pivot sprinkler irrigation, only 11% observations came from type. Most (>85%) used by all had standing water or recent moisture at time use. Though many types when flooded fields, alfalfa (58%) greater than availability (38%). also observed distinct distribution around colonies. Whereas foraged directions (~80%) 12-km colony, over half 12–22 km, almost exclusively south southeast reflecting agriculture area. The most common distance (12–22 km) is found existing literature, suggesting that 12 km may need travel farther find adequate habitat. Flood-irrigated provide habitats eastern Idaho should considered future conservation wetland birds.
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ژورنال
عنوان ژورنال: Journal of Wildlife Management
سال: 2022
ISSN: ['1937-2817', '0022-541X']
DOI: https://doi.org/10.1002/jwmg.22288