scholarly journals Frequency-dependent seed predation by rodents on Sonoran Desert winter annual plants

Ecology ◽  
2017 ◽  
Vol 99 (1) ◽  
pp. 196-203 ◽  
Author(s):  
Jonathan L. Horst ◽  
D. Lawrence Venable
Keyword(s):  
Seed Predation ◽  
Sonoran Desert ◽  
Annual Plants ◽  
Frequency Dependent ◽  
Winter Annual

Water-use efficiency and relative growth rate mediate competitive interactions in Sonoran Desert winter annual plants

2013 ◽  
Vol 100 (10) ◽  
pp. 2009-2015 ◽  
Author(s):  
Jennifer R. Gremer ◽  
Sarah Kimball ◽  
Katie R. Keck ◽  
Travis E. Huxman ◽  
Amy L. Angert ◽  
...  
Keyword(s):  
Growth Rate ◽  
Water Use Efficiency ◽  
Relative Growth Rate ◽  
Water Use ◽  
Sonoran Desert ◽  
Competitive Interactions ◽  
Annual Plants ◽  
Relative Growth ◽  
Use Efficiency ◽  
Winter Annual

scholarly journals Soil-borne fungi influence seed germination and mortality, with implications for coexistence of desert winter annual plants

PLoS ONE ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. e0224417 ◽  
Author(s):  
Yue M. Li ◽  
Justin P. Shaffer ◽  
Brenna Hall ◽  
Hongseok Ko
Keyword(s):  
Seed Germination ◽  
Annual Plants ◽  
Winter Annual ◽  
Soil Borne Fungi

scholarly journals Water and nitrogen shape winter annual plant diversity and community composition in near‐urban Sonoran Desert preserves

2021 ◽  
Author(s):  
Megan M. Wheeler ◽  
Scott L. Collins ◽  
Nancy B. Grimm ◽  
Elizabeth M. Cook ◽  
Christopher Clark ◽  
...  
Keyword(s):  
Community Composition ◽  
Plant Diversity ◽  
Sonoran Desert ◽  
Annual Plant ◽  
Winter Annual

Seedling emergence and survival of Warea carteri (Brassicaceae), an endangered annual herb of the Florida Scrub

2007 ◽  
Vol 85 (7) ◽  
pp. 621-628 ◽  
Author(s):  
Carl W. Weekley ◽  
Eric S. Menges ◽  
Pedro F. Quintana-Ascencio
Keyword(s):  
Seedling Survival ◽  
Seedling Emergence ◽  
Annual Plants ◽  
Seedling Density ◽  
Florida Scrub ◽  
Seedling Emergence And Survival ◽  
History Of ◽  
Annual Herb ◽  
Winter Annual ◽  
Persistent Seed Bank

Seedling emergence and survival to flowering are critical processes in the life history of annual plants. We evaluated the importance of year and habitat on seedling emergence and the effects of year, habitat, timing of seedling emergence, and seedling density on survival of Warea carteri Small, an annual mustard endemic to Florida scrub. We tagged 1329 seedlings in 78 permanent 0.25 m2 quadrats in two habitats (scrub and disturbed) between 1999 and 2002 and followed seedlings monthly. Most (>80%) seedling emergence occurred between September and December. Emergence peaked 2 months earlier and was more variable in disturbed sites than in scrub. Seedling survival among years ranged from 3.5% to 12.0%. Seedling density varied from 1 to 75 per 0.25 m2 quadrat, with an overall median of 6.0. Survival was not density dependent. Median age at flowering ranged from 11.7 to 15.2 months, with late season recruits most likely to survive to flowering. Warea carteri recruits like a winter annual but flowers like a summer annual. Its delayed germination and a 12–15 month life span contribute to population cycling. Complete reproductive failure in unfavorable years, high seed production in favorable years, low rates of seed germination, and a persistent seed bank are consistent with predictions for an annual species in a variable habitat.

Coexistence of annual plants: Generalist seed predation weakens the storage effect

Ecology ◽  
2009 ◽  
Vol 90 (1) ◽  
pp. 170-182 ◽  
Author(s):  
Jessica J. Kuang ◽  
Peter Chesson
Keyword(s):  
Seed Predation ◽  
Storage Effect ◽  
Annual Plants

Pre-germination seed vernalization and secondary seed dormancy in winter annual plants

2004 ◽  
Vol 49 (Supplement) ◽  
pp. 36-37
Author(s):  
T. Yoshioka ◽  
S. Satoh ◽  
T. Enomoto ◽  
M. Fenner
Keyword(s):  
Seed Dormancy ◽  
Annual Plants ◽  
Winter Annual

PHOTOSYNTHETIC RESOURCE-USE EFFICIENCY AND DEMOGRAPHIC VARIABILITY IN DESERT WINTER ANNUAL PLANTS

Ecology ◽  
2008 ◽  
Vol 89 (6) ◽  
pp. 1554-1563 ◽  
Author(s):  
Travis E. Huxman ◽  
Greg Barron-Gafford ◽  
Katharine L. Gerst ◽  
Amy L. Angert ◽  
Anna P. Tyler ◽  
...  
Keyword(s):  
Resource Use ◽  
Annual Plants ◽  
Resource Use Efficiency ◽  
Use Efficiency ◽  
Winter Annual

Models of Invasion and Establishment for African Mustard (Brassica tournefortii)

2014 ◽  
Vol 7 (4) ◽  
pp. 599-616 ◽  
Author(s):  
Kristin H. Berry ◽  
Timothy A. Gowan ◽  
David M. Miller ◽  
Matthew L. Brooks
Keyword(s):  
Sonoran Desert ◽  
Ecosystem Change ◽  
Data Sets ◽  
Annual Plants ◽  
Stream Channel ◽  
Stream Channels ◽  
Ephemeral Stream ◽  
Disturbed Areas ◽  
Brassica Tournefortii ◽  
Noxious Weed

AbstractIntroduced exotic plants can drive ecosystem change. We studied invasion and establishment ofBrassica tournefortii(African mustard), a noxious weed, in the Chemehuevi Valley, western Sonoran Desert, California. We used long-term data sets of photographs, transects for biomass of annual plants, and densities of African mustard collected at irregular intervals between 1979 and 2009. We suggest that African mustard may have been present in low numbers along the main route of travel, a highway, in the late 1970s; invaded the valley along a major axial valley ephemeral stream channel and the highway; and by 2009, colonized 22 km into the eastern part of the valley. We developed predictive models for invasibility and establishment of African mustard. Both during the initial invasion and after establishment, significant predictor variables of African mustard densities were surficial geology, proximity to the highway and axial valley ephemeral stream channel, and number of small ephemeral stream channels. The axial valley ephemeral stream channel was the most vulnerable of the variables to invasions. Overall, African mustard rapidly colonized and quickly became established in naturally disturbed areas, such as stream channels, where geological surfaces were young and soils were weakly developed. Older geological surfaces (e.g., desert pavements with soils 140,000 to 300,000 years old) were less vulnerable. Microhabitats also influenced densities of African mustard, with densities higher under shrubs than in the interspaces. As African mustard became established, the proportional biomass of native winter annual plants declined. Early control is important because African mustard can colonize and become well established across a valley in 20 yr.

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