Journal Title
Title of Journal: Plant Ecol
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Abbravation: Plant Ecology
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Publisher
Springer Netherlands
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Authors: RE Drenovsky JH Richards
Publish Date: 2006/03/14
Volume: 183, Issue: 2, Pages: 305-314
Abstract
Both water and nutrients are limiting in arid environments and desert plants have adapted to these limitations through numerous developmental and physiological mechanisms In the Mono Basin California USA codominant Sarcobatus vermiculatus and Chrysothamnus nauseosus ssp consimilis are differentially N and P limited We hypothesized that low leaf N resorption contributes to Nlimitation in Sarcobatus and that low leaf P resorption contributes to Plimitation in Chrysothamnus As predicted Sarcobatus resorbed proportionally 17fold less N than Chrysothamnus but reduced leaf P in senescent leaves to lower levels than Chrysothamnus 80–108fold lower based on leaf area or mass respectively consistent with N but not P limitations in Sarcobatus Again as predicted Chrysothamnus resorbed proportionally 20fold less P than Sarcobatus yet reduced leaf N in senescent leaves to lower levels than Sarcobatus 18–13fold lower based on leaf area or mass respectively consistent with P but not N limitations in Chrysothamnus Leaf N and P pools were approximately 50 of aboveground pools in both species during the growing season suggesting leaf resorption can contribute significantly to whole plant nutrient retention This was consistent with changes in leaf N vs P concentration as plants grew from seedlings to adults Our results support the conclusion that Nlimitation in Sarcobatus and Plimitation in Chrysothamnus are in part caused by physiological or other constraints that prevent more efficient resorption of N or P respectively For these species differential nutrient resorption may be a key physiological component contributing to their coexistence in this saline low resource habitatWe thank J James J Drewitz J Stimac A␣Breen M Caird A DainOwens J Drenovsky and K Snyder for laboratory and field assistance and L Donovan A Läuchli J James J␣Drewitz J Erskine and J Stimac for manuscript review A JastroShields Research Fellowship a UC Davis Humanities Research Award National Science Foundation grant IBN99–03004 and the California Agricultural Experiment Station supported this work
Keywords:
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- Phylogenetic structure of a palm community in the central Amazon: changes along a hydro-edaphic gradient
- The nutrient status of epiphytes and their host trees along an elevational gradient in Costa Rica
- The nutrient status of epiphytes and their host trees along an elevational gradient in Costa Rica
- Recovery of genetic diversity in threatened plants through use of germinated seeds from herbarium specimens
- Allocation to reproduction following experimental defoliation in Platanthera bifolia (Orchidaceae)
- Regional and local variation in seedling emergence, mortality and recruitment of a perennial herb in Mediterranean mountain habitats
- Does taxonomic homogenization imply functional homogenization in temperate forest herb layer communities?
- Competitive responses of the rare Viola elatior and the common Viola mirabilis
- Interspecific competition enhances nitrogen fixation in an actinorhizal shrub
- Can seed caching enhance seedling survival of Indian ricegrass ( Achnatherum hymenoides ) through intraspecific facilitation?
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- Mistletoes via input of nutrient-rich litter increases nutrient supply and enhance plant species composition and growth in a semi-arid savanna, southwest Zimbabwe
- Conifer colonization of a 350-year old rock fall at Lassen Volcanic National Park in northern California
- Extent and spatial patterns of grass bald land cover change (1948–2000), Oregon Coast Range, USA
- The plant vigour hypothesis revisited – how is browsing by ungulates and elephant related to woody species growth rate?
- The significance of deadwood for total bryophyte, lichen, and vascular plant diversity in an old-growth spruce forest
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- Demographic effects of fire on two endemic plant species in the longleaf pine-wiregrass ecosystem
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- Gap formation and regeneration of tropical mangrove forests in Ranong, Thailand
- Composition and structure of a diverse tree community at the edges of a Brazilian Amazon rainforest island surrounded by marshes and mangroves
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