Seed germination responses to salinity for three rare wetland plants of spring-fed arid systems
نویسندگان
چکیده
Spring-fed wetlands within arid systems host unique species of plants, many which are threatened due to the vulnerability these ecosystems. Increased salinity and drier hydrologic regimes anthropogenic activities threaten systems. Furthermore, limited knowledge regarding key life history traits jeopardize restoration management their rare plants. Here, we evaluated aspects seed ecophysiology three plants Southwestern United States: Helianthus paradoxus (Pecos sunflower), Cirsium wrightii (Wright's marsh thistle), Agalinis calycina (Leoncita false-foxglove). We examined dormancy break under controlled conditions effects field-derived gradients on germination. Seeds C. were nondormant at dispersal, germination was high (>70%) all treatments not affected by tested salinities. Germination in H. following cold stratification, but increasing salinities reduced A. seeds required low (<50%) during incubation had greatest negative this species. Our findings contribute wetland spring-fed marshes susceptible groundwater declines human-induced salinization.
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ژورنال
عنوان ژورنال: Journal of Arid Environments
سال: 2022
ISSN: ['1095-922X', '0140-1963']
DOI: https://doi.org/10.1016/j.jaridenv.2021.104705