Call Girls In Bloom Boutique | GK-1 โ 9990224454 High Class Delhi NCR 24 Hour...
ย
Bobcat HSI Model
1. Roberts, S.B., J.D. Jordan, P. Bettinger, and R.J.
Warren. 2010.
Journal of Wildlife Management 74:386-384.
Kelsi Potterf
USING BOBCAT HABITAT
SUITABILITY
TO PRIORITIZE HABITAT
PRESERVATION ON A
SUBURBANIZING BARRIER
ISLAND
2. ๏ก Growing emphasis on
wildland-urban interface as
urban sprawl continues
๏ก Incorporation of green space
by developers
๏ก Develop a habitat assessment
tool for the bobcat (Lynx
rufus)โHSI
๏ง Habitat requirements
๏ง Ecological niche
๏ง Sensitivity to fragmentation
๏ง Social appeal
INTRODUCTION
3. ๏ก Lancia et al. (1982), Boyle and Fenley (1987)โ
Southeastern US
๏ง Food Suitability Index (FSI)โoptimal habitat for cotton rats
(Sigmodon hispidus) and eastern cottontail (Sylvilagus floridanus)
๏ง 90% grass, forb, or shrub cover with 50-70%vegetation in grasses
or forbs
๏ก Connor and Leopold (1998)โMississippi National Forest
habitat suitability for female bobcats
๏ก Woolf et al. (2002)โhome-range scale across Illinois
๏ก Nielsen and Woolf (2002)โcorrelates suitability to
abundance in southern Illinois
SIMILAR STUDIES
4. ๏ก All were small scale and only natural habitats
๏ก Only focus on food availability
๏ก Assumes that FSI would satisfy cover needs
PROBLEMS WITH PREVIOUS RESEARCH
5. ๏ก Reassess land-preservation opportunities with a
simple, effective and biological tool
๏ก Kiawah Island Natural Habitat Conservancy (KINHC)
๏ก Fine scale suitability
๏ง Modified bobcat Habitat Suitability Index (MHSI) Model using
telemetry data, den counts, and prey counts
๏ก Integrate FSI, Cover Suitability Index (CSI), and Den
Suitability Index (DSI)
๏ง Urban areas can cause these requisites to be mutually exclusive
๏ง Other life requisites are met in undeveloped areas
PURPOSE
6. ๏ก Kiawah Island
๏ง 3500 ha coastal barrier island
๏ง 1500 ha marsh
๏ง 2000 ha thickets, ponds, golf course, resort development and sand
๏ก 25 km south of Charleston, South Carolina
๏ก Development began in 1974
๏ก By 2005 there were 3000
parcels
๏ก 70 homes added per year
๏ก Local regulations maintain
green spaceโmosaic
๏ง Buffer strips
๏ง Canopy cover
๏ง Riparian vegetation
STUDY AREA
8. ๏ก Supports 30 bobcatsโ1.4 per upland km2
๏ก Can occur at densities from 5 per 100 km2 to 48 per
100 km2
๏ก Home ranges vary
based on ecology
๏ก Home range
between 6 km2 and
325 km2
(IUCN 2014)
KIAWAH ISLAND
9. ๏ก 9 land cover typesโinput to Arc GIS 9.1
๏ง Geo-referenced plat map
๏ง Municipal building permit data
๏ง Infrared digital orthophotography
๏ก Modified HSI grid created from FSI, CSI and DSI grids
๏ง Hawthโs Analysis Tools to evaluate mean MHSI value within each
parcel
METHODS
10. ๏ก Hawthโs Analysis Tools to estimate FSI for each land
cover type
๏ง 1000 random locations
๏ง Nocturnal radiotelemetry locations
๏ก Small scale rodent trapping supported FSI values
FOOD SUITABILITY INDEX
11. ๏ก Area covered by forest or shrub for concealment
๏ง Areas next to roadways not included due to noise
๏ง Diurnal radiotelemetry locations
๏ก Radiocollared 16 bobcatsโ8 males and 8 females
from April 2004 to March 2005
๏ง Telemetry locations
recorded 5 times a week
๏ง Recording start time
shifted by 2 hours
๏ง Records occurred more
than 12 hours apart
๏ง An average of 154
locations collected for
each bobcat
COVER SUITABILITY INDEX
12. ๏ก Forest and shrub land cover types
๏ก Shape and size of core habitatโno smaller than 2 ha
๏ง Visual Basic 6.0โ2 ha moving window grid
๏ก Den location in spring of 2004 and 2005โ6 located
๏ง 2 dens located in areas considered unsuitable
๏ง Recommend the use of a minimum threshold on MHSI
DEN SUITABILITY INDEX
13. ๏ก Highly SuitableโMHSI=0.83*
๏ง 367.1 ha forest*
๏ง 306.4 ha shrub*
๏ง 116.4 ha open dune
๏ง 425.8 ha developed
๏ง Totalโ1215.7 ha (43.7%)
๏ก UninhabitableโMHSI=0
๏ง 807 ha salt marsh
๏ง 234.1 ha sand
๏ง 208.8 ha golf course
๏ง 160.7 ha roads
๏ง 153.7 ha water
๏ง Totalโ1564.3 ha (57.3%)
RESULTS
18. ๏ก Results support Boyle and Fendley (1987) modelโ
cotton rat availability
๏ก Bobcat-human ecology
๏ง Activity reduced to avoid human interaction
๏ก Current use as an umbrella species for habitat
preservation
๏ง Under some scrutiny
DISCUSSION
19. ๏ก Population very unique
๏ก MHSI specific to this population
๏ง Isolated population
๏ง High population density
๏ง May not be location-appropriate focal species
DISCUSSION