Microhabitat dependent responses to resource pulses in the aridland perennial, Cryptantha flava
نویسندگان
چکیده
منابع مشابه
Enhancement of photosynthesis and growth of an aridland perennial in response to soil nitrogen pulses generated by mule deer
The altitudinal range of the aridland herbaceous perennial Cryptantha flava overlaps with the wintering range of mule deer (Odocoileous hemionus ) in the Colorado Plateau region of the western United States. Deer do not feed on C. flava , but do influence its microhabitat via excretion of nitrogenous compounds. We were interested in determining the importance of Mule deer in redistributing N ac...
متن کاملMorphology and Dispersal of One- and Two-Seeded Diaspores of Cryptantha flava
The wind-dispersed diaspore of the herbaceous perennial Cryptantha flava (Boraginaceae) consists of one, or occasionally two, nutlets (seeds) enclosed in a pubescent calyx. Physical characteristics of oneand two-seeded diaspores and their rates of descent in still air were compared. Natural dispersal distances in the field of calyces containing 0, 1, or 2 seeds were also measured. Two-seeded di...
متن کاملA stage-based study of drought response in Cryptantha flava (Boraginaceae): gas exchange, water use efficiency, and whole plant performance.
Models of global climate change predict an increase in the frequency of major droughts, yet we know little about the consequences of drought for the demography of natural populations. This study examined a population of the semi-desert perennial Cryptantha flava (Boraginaceae) to determine how plants of different developmental stages respond to drought through changes in leaf gas exchange, leaf...
متن کاملA demographic approach to study effects of climate change in desert plants.
Desert species respond strongly to infrequent, intense pulses of precipitation. Consequently, indigenous flora has developed a rich repertoire of life-history strategies to deal with fluctuations in resource availability. Examinations of how future climate change will affect the biota often forecast negative impacts, but these-usually correlative-approaches overlook precipitation variation beca...
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ژورنال
عنوان ژورنال: Journal of Ecology
سال: 2003
ISSN: 0022-0477,1365-2745
DOI: 10.1046/j.1365-2745.2003.00778.x