Spatial variation in giraffe demography: a test of 2 paradigms

@article{Lee2016SpatialVI,
  title={Spatial variation in giraffe demography: a test of 2 paradigms},
  author={Derek E. Lee and Monica L. Bond and Bernard M Kissui and Yustina Andrew Kiwango and D. Bolger},
  journal={Journal of Mammalogy},
  year={2016},
  volume={97},
  pages={1015 - 1025}
}
Examination of spatial variation in demography among or within populations of the same species is a topic of growing interest in ecology. We examined whether spatial variation in demography of a tropical megaherbivore followed the “temporal paradigm” or the “adult survival paradigm” of ungulate population dynamics formulated from temperate-zone studies. We quantified spatial variation in demographic rates for giraffes (Giraffa camelopardalis) at regional and continental scales. Regionally, we… 
Movements and source–sink dynamics of a Masai giraffe metapopulation
TLDR
A regional metapopulation analysis to inform conservation management for Masai giraffes in five subpopulations defined by land management designations and highlights the importance of identifying source–sink dynamics among sub Populations for effective conservation planning and emphasizes how protected areas can play an important role in sustaining meetapopulations.
Population Dynamics of Browsing and Grazing Ungulates in the Anthropocene
TLDR
Analysis of patterns of ungulate population dynamics, intrinsic and extrinsic causal factors underlying population growth, and consequences of variation in these causal factors in the face of anthropogenic change indicates that obligate grazers in sub-tropical regions may be particularly threatened given the scale and diversity ofanthropogenic perturbations.
Spatial variation in vital rates and population growth of thick-billed murres in the Atlantic Arctic
Understanding spatiotemporal variation in vital rates and population growth rates is a central aim of population ecology, and is critical to conservation of migratory species where different
Long‐term population dynamics in a multi‐species assemblage of large herbivores in East Africa
Wildlife population declines in Africa are widespread. However, species-specific population trends and dynamics in mammal community composition have rarely been described over long time periods. To
Differential adult survival at close seabird colonies: The importance of spatial foraging segregation and bycatch risk during the breeding season
TLDR
The overlap of information obtained by the generation of specific bycatch risk maps, the quantification of population demographic parameters, and the foraging spatial analysis should inform managers about differential sensitivity to the anthropogenic impact at mesoscale level and guide decisions depending on the spatial configuration of local populations.
Fission–fusion dynamics of a megaherbivore are driven by ecological, anthropogenic, temporal, and social factors
TLDR
Sex- and age-based differences in habitat use reflected nursing mothers’ need for high-quality forage while also protecting their young from predation, and have implications for conservation and management of giraffes and other large-bodied, herd-forming ungulates in heterogeneous environments subject to anthropogenic threats.
Genetic connectivity and population structure of African savanna elephants (Loxodonta africana) in Tanzania
TLDR
The genetic structure and gene flow of African savanna elephants in Tanzania is investigated using microsatellite and mitochondrial DNA markers to indicate distinct population genetic structure within and between ecosystems across Tanzania, and reveal important priority areas for connectivity conservation.
Sociability increases survival of adult female giraffes
TLDR
For adult female giraffes, grouping with more other females, even as group membership frequently changes, is correlated with better survival, and this sociability appears to be more important than several attributes of their non-social environment.
...
1
2
3
...

References

SHOWING 1-10 OF 81 REFERENCES
A slow life in hell or a fast life in heaven: demographic analyses of contrasting roe deer populations.
TLDR
The results shows that the plethora of environmental conditions faced by populations of large herbivores also induce high intraspecific variation in their ranking along the 'fast-slow' continuum of life-history tactics.
Impact of Spatial and Temporal Variation in Calf Survival on the Growth of Elk Populations
TLDR
Life-Stage Simulation Analysis was conducted to incorporate both vital-rate elasticity patterns and empirical estimates of variability to identify those vital rates most influential in elk population dynamics and suggest that the majority of interannual variability that wildlife managers document in late-winter and spring elk surveys is attributable to variation in calf survival over the previous year.
Modeling survival at multi-population scales using mark-recapture data.
TLDR
A statistical model for the analysis of individual monitoring data at the multi-population scale is described that derives an index of synchrony among populations in the pattern of temporal variation in survival, and the extent to which environmental factors contribute to synchronize or desynchronize survival variation among populations is evaluated.
Demography of central and marginal populations of monkeyflowers (Mimulus cardinalis and M. lewisii).
TLDR
Life table response analysis decomposed spatiotemporal variation in lambda into contributions from each transition between life stages, finding that transitions from large nonreproductive and reproductive plants to the seed class and stasis in the reproductive class made the largest contributions to spatial differences in lambda.
CLIMATE, HABITAT QUALITY, AND FITNESS IN NORTHERN SPOTTED OWL POPULATIONS IN NORTHWESTERN CALIFORNIA
A controversy exists in the Pacific Northwest of the United States between logging of old-growth coniferous forests and conservation of Northern Spotted Owl (Strix occidentalis caurina) populations.
Small‐scale spatial dynamics in a fluctuating ungulate population
TLDR
Detailed census data collected over a 10-year period from a population of Soay sheep on the Island of Hirta in the St Kilda archipelago, Scotland, is used, together with cluster analysis, to distinguish a temporally stable spatial substructure.
RETROSPECTIVE ANALYSIS OF DEMOGRAPHIC RESPONSES TO ENVIRONMENTAL CHANGE: A LESSER SNOW GOOSE EXAMPLE
In general, analysis of population dynamics can proceed either prospectively or retrospectively. In the case of the former, asymptotic expectations are generally derived (analytically or numerically)
Demographic Processes Underlying Population Growth and Decline in Salamandra salamandra
TLDR
Data from long-term mark-recapture studies of two natural populations of the salamander Salamandra salamandra were used to confirm the predictions of population models and suggest that amphibian conservation efforts should focus on all stages of the life cycle and their associated habitats.
Comparative changes in adult vs. juvenile survival affecting population trends of African ungulates
TLDR
Annual survival rates were estimated for the juvenile, yearling and adult segments of nine ungulate species in South Africa's Kruger National Park and stage-specific survival rates appeared dependent on body mass, but with some anomalies.
Ecology of the giraffe in Tsavo East National Park, Kenya
TLDR
The future of the giraffe in Tsavo East National Park depends on the development of the woody vegetation inside the park, and probably also on the future pattern of land use outside, as some giraffes appear to move out of the park at times.
...
1
2
3
4
5
...