Challenges to Introducing and Managing Disturbance Regimes for Holocarpha macradenia, an Endangered Annual Grassland Forb

@article{Holl2006ChallengesTI,
  title={Challenges to Introducing and Managing Disturbance Regimes for Holocarpha macradenia, an Endangered Annual Grassland Forb},
  author={Karen D. Holl and Grey F. Hayes},
  journal={Conservation Biology},
  year={2006},
  volume={20}
}
Abstract:  Introducing rare plants to new sites for conservation to offset effects of habitat destruction requires detailed knowledge of habitat requirements, plant demography, and management needs. We conducted a factorial experiment replicated at three coastal prairie sites to test the effects of clipping frequency and litter accumulation on seed germination, seedling survival, reproduction, and seedling recruitment of introduced populations of the endangered, tall‐stature, annual forb… 
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References

SHOWING 1-10 OF 73 REFERENCES
Demographic variation and population viability in Gentianella campestris: effects of grassland management and environmental stochasticity
TLDR
Traditional grassland management is more favourable for G. campestris than the methods that prevail in Scandinavia today, and this indicates a serious conservation problem, because grazing has replaced traditional management in many of the remaining semi-natural grasslands throughout Europe.
Site-specific responses of native and exotic species to disturbances in a mesic grassland community
TLDR
Treatment response of some plant guilds differed among sites, highlighting the importance of replicating experiments at several sites before recommending conservation manage- ment practices.
Reducing Competitive Suppression of a Rare Annual Forb by Restoring Native California Perennial Grasslands
TLDR
Results of this research suggest that restored native perennial grasslands at intermediate densities have a high habitat value for the potential establishment of the native annual A. grandiflora.
Contrasting litter effects on old field tree germination and emergence
TLDR
Litter may contribute to the slow rate of tree invasion and the low probability of tree establishment in old fields, but old field litter studies taken together point to the difficulty in drawing general conclusions about any ‘net effect’ of litter on old field tree establishment.
Effects of Temporal Variability on Rare Plant Persistence in Annual Systems
TLDR
It is concluded that contrary to conventional predictions of conservation and population biology, yearly fluctuations in climate may be essential for the persistence of rare species in invaded habitats.
Effects of rainfall variability and gopher disturbance on serpentine annual grassland dynamics
We studied the dynamics of a serpentine annual grassland in northern Cal- ifornia in relation to disturbance by pocket gophers (Thomomys bottae) and interannual variation in rainfall over the period
Modulation of diversity by grazing and mowing in native tallgrass prairie
TLDR
Mowing or the reestablishment of grazing in anthropogenically stressed grasslands enhanced biodiversity, particularly on burned and fertilized treatments.
What is a Safe Site?: Neighbor, Litter, Germination Date, and Patch Effects
TLDR
Variation in patch favorableness must prevent populations from reaching a stable spatial distribution and from reach a stable age distribution in any given patch, according to the rank order of quadrat favorability for seedlings.
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