PB b Conservation Objectives – 1st Draft.ppt [Read-Only]
Transcript of PB b Conservation Objectives – 1st Draft.ppt [Read-Only]
Conservation Objectives – 1st Draft
Overall Conservation Goal:Sustain the distribution, diversity, and abundance of native landbird populations and their habitats in Ontario's portion of Bird Conservation Region (BCR) 13
Objectives of the BCR 13 Plan:
• Present a Species Assessment for Landbirds• Identify Priority Species and Habitats• Present measurable Population & Habitat Objectives• Set out recommended Actions to achieve Objectives• Indicate where Conservation Actions most useful• Give Monitoring Objectives & Key Research Needs• Set Timeframe & Mechanism for Evaluation• Communicate Landbird Conservation Needs &
Recommended Actions
High Level Conservation Objectives:
• Reverse Declines of most Priority Species• Stop Declines of Priority Grassland Species & Guild• Recover Endangered & Threatened Species• Maintain Distribution of Priority Species in BCR 13• Ensure Habitat of sufficient Quality & Quantity to
meet population & distribution objectives• Monitor Trends & Distribution of all Landbirds, and
their Habitats• Research Reasons for Declines, Landbird Needs,
Impacts & Success of Actions
Specific Population ObjectivesExample for Forest Birds
Population Trend & Size Objectives:
SpeciesTrend
ObjectiveBBS Index Objective
Pop'n Target
Black-billed Cuckoo Reverse Decline 1.4 63,000Red-headed Woodpecker Reverse Decline 0.63 24,000Northern Flicker Reverse Decline 6.5 240,000Wood Thrush Maintain / Increase 2.4 150,000Canada Warbler Maintain / Increase 0.11 3,500Veery Maintain 3.3 180,000Rose-breasted Grosbeak Maintain 4.8 140,000Long-eared Owl Establish TrendCerulean Warbler Establish TrendLouisiana Waterthrush Establish Trend
Trend Objective: Based on BBS long-term trends (1968-2002)
SpeciesBCR 13 Trend
(% / yr)
BCR 13 Ontario Trend
Black-billed Cuckoo -2.3 -2.1Red-headed Woodpecker -6.0 -6.5Northern Flicker -3.2 -3.1Veery -0.5 0.0Wood Thrush -1.0 1.0Canada Warbler -4.7 -0.1Rose-breasted Grosbeak 0.3 -1.0Red-shouldered Hawk -0.6Acadian Flycatcher -3.7Bay-breasted Warbler 17.8Cerulean Warbler 3.8Louisiana Waterthrush 0.3Hooded Warbler 6.4Rusty Blackbird 45.0
BBS Index Objective: Track progress against Trend Objective
Red-headed Woodpecker - BBS Count Index & Objective
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1967 1972 1977 1982 1987 1992 1997 2002
Red Line – Annual Indices calculated by BBS Trend Program (B. Collins)Green Line – Index Objective, = average of 1968-1977 indices
Population Target: Direct translation of BBS IndexIllustrates magnitude of Action neededCould substitute other estimates if available
Comparison of Population EstimatesBCR 13 Ontario
y = 2.20x0.96
R2 = 0.94
100
1,000
10,000
100,000
1,000,000
10,000,000
100 1,000 10,000 100,000 1,000,000 10,000,000BBS pop'n estimate
Atla
s po
p'n
estim
ate
Guild Trend Objectives: Sum of all Forest Birds, BBS stops
Guild Trend Objective BBS Index ObjectiveForest Birds Maintain 39.7 (1968-77 avg)
Woodland Birds BBS Stop Index, BCR 13 Ontario
30
35
40
45
50
55
60
1967 1972 1977 1982 1987 1992 1997 2002
Distribution Objectives: Based on Atlas change (81-85 vs 01-03)
• Reverse Losses of Priority forest species in each subregion• Maintain distribution of priority species without losses• Maintain distribution of forest bird guild, in each subregion
Distribution Objectives: Changes by BCR 13 subregion
Forest SpeciesAtlas
Squares 2001-03
Expected per 1st Atlas
Difference BCR 13
Diff. SWest
Diff. Central
Diff. East
Diff. NWest
Hooded Warbler 59 14 45 15 29 +Acadian Flycatcher 29 23 6 + +
Bay-breasted Warbler 9 6 + _ 5 + _
Prothonotary Warbler 15 12 + + + _
Rusty Blackbird 8 6 + + + + _
Black-billed Cuckoo 502+ 536 -? -? + -? +
Kirtland's Warbler 0 1 _ _
Northern Flicker 707 710 _ _ _ _ +
Louisiana Waterthrush 21 27 _ _ _ +
Rose-breasted Grosbeak 679 687 _ + _ _ -6Red-shouldered Hawk 146 159 _ _ _ _ _
Wood Thrush 633 653 -20 _ _ -12 +
Cerulean Warbler 40 61 -21 _ -11 _ _
Canada Warbler 179 229 -50 _ _ -21 _
Long-eared Owl 54 112 -58 _ -18 -37 _
Veery 555 636 -81 -43 -32 _ -6Northern Saw-whet Owl 66 155 -89 -7 -29 -60 _
Red-headed Woodpecker 184 507 -323 -127 -132 -45 -13
Distribution Objectives: Targets by BCR 13 subregion
Species BCR 13 SWest Central East NWest
Northern Flicker 99.5% 100% 99.7% 99.5% 97%Rose-breasted Grosbeak 96% 93% 99% 99% 90%Wood Thrush 92% 94% 93% 96% 56%Veery 89% 82% 91% 92% 100%Black-billed Cuckoo 75% 71% 74% 85% 64%Red-headed Woodpecker 71% 91% 76% 40% 59%Canada Warbler 32% 22% 38% 28% 58%Red-shouldered Hawk 22% 8% 26% 32% 32%Northern Saw-whet Owl 22% 5% 17% 51% 24%Long-eared Owl 16% 9% 13% 33% 5%Cerulean Warbler 9% 11% 9% 6% 3%Louisiana Waterthrush 4% 8% 3% 0.5%Bay-breasted Warbler 0.9% 0.4% 0.3% 0.5% 8%Rusty Blackbird 0.8% 1% 1% 3%- targets percents are from 1981-85 Atlas, squares with > 20 hours effort
Targets for % Atlas Squares with Breeding Evidence
Distribution Objectives: Forest Guild
Guild BCR 13 SWest Central East NWest
Forest Birds 28.1 24.1 28.9 30.2 35.2- based on 1981-85 Atlas, squares with > 20 hours effort
Target number of species per Atlas square
Forest Species per Atlas square with 20+ hours of effort: 1981-85: 28.1 2001-03: 28.8 Change: +0.7
Options for Habitat Objectives:
Amount of Habitat:• Desired change in Land Cover Relative to Current Situation• Total land needed to meet population objectives• Proportion of land needed to ensure species richness
Patch Size – for Core "source" areas, other satellite habitats
Buffer Sizes – Width of buffers around important habitats– Types of appropriate land uses in buffers
Where to Locate Core Habitats
Current Land Cover:
General TotalLand Cover Southwest Central Eastern Northwest BCR 13Marsh 1% <1% 2% 2% 1%Swamp 1% 4% 7% 2% 3%Dense Forest 12% 25% 32% 52% 23%Sparse Forest 1% 3% 3% 20% 3%Fields 2% 13% 22% 18% 12%Crops 81% 50% 32% 3% 54%Urban 2% 5% 2% <1% 3%
Type of TotalForest Cover Southwest Central Eastern Northwest BCR 13Deciduous 80% 58% 60% 32% 59%Mixed 12% 20% 25% 40% 23%Coniferous 8% 22% 15% 27% 18%
BCR 13 subregions
BCR 13 subregions
By subregion:
Possible Objective:Increase Total Forest in SW
from 14% to 20%
How Much Habitat: Estimates from BBS / BBC
PrioritySpecies bcr13 ON best 10% % bcr km2 BBS best 10% BB Census
Forest BirdsNorthern Flicker 3.4 30 30% 24,000 4.7 9.8Rose-breasted Grosbeak 3.7 39 13% 11,000 6.1 17.7Wood Thrush 2.8 59 9% 8,000 9.3 22.6Black-billed Cuckoo 1.1 27 9% 7,000 4.3 2.3Veery 3.9 79 8% 7,000 12.6 23.1Red-headed Woodpecker 0.2 39 2% 2,000 6.2 1.4Canada Warbler 0.1 38 0% 300 6.0 9.3
Density (pr/km2)Est. Habitat NeedBBS avg / rte
Possible Objective:
Minimum of 24,000 km2 of forest cover (30% of BCR13) to support full suite of priority species, with at least 8,000 km2 mature forest to support target breeding populations of Wood Thrushes and other forest interior birds
Buffer Widths / Types:Ø1 km buffer of non-intensive land use around core forests or
other natural areas of high importance to priority species
Ø240 m buffer around larger wetlands, 30m around streams
Patch Size:Core Areas > 1,000 ha in each subregion
- source areas for full suite of birdsAdditional areas > 200 ha, minimum 500m width
- productive for area-sensitive speciesAdditional smaller patches in surrounding matrix