The Relation between Seasonal Migration and Snow Depth

The Relation between Seasonal Migration and Snow Depth

Seasonal migration routes of Sika deer
and
Importance of GPS data
Tomomi Kudo
SCGIS Scholar
JAPAN
Non Profit Organization EnVision Conservation Office
About Japan
Tokyo
・Population:127 million
・Area: 37,790,000 ha
・Capital : Tokyo
About Hokkaido
Sapporo
Blakiston’s fish owl
Brown bear
・Endangered species
・full length : 70cm
・wing span : 190cm
Steller’s sea eagle
・natural monument
・full length : 100cm
・wing span : 250cm
Research
＆
Survey
Policy
Advocacy
Environmental
Education
Data
&
Info. Sharing
International
Cooperation
Sika deer(Cervus Nippon)
Population Change
70
60
Agriculture and Forestry damage costs (Billion of ￥)
Estimated number of deer (Million deer)
Number of captured deer (Million deer)
1 dollar = 110 yen
50
40
30
20
10
0
00 01 02 03 04 05 06 07 08 09 10 11 12 13 14(year)
Factor of population change
■Predator
Sika deer’s predator, wolf was extinct 100 years ago.
■Hunter
Hunter’s population is tend to decreasing and aging.
■Climate change
Recently, we have less much snow in winter.
So that Sika deer doesn’t bother feeding and moving.
Influence By Population Change
Vegetation damage
Eating rare species
Eating specific species
Feeding Pasture
Eating Bark
Traffic accident
Biodiversity
Wild life animals
Farmer
Forest Owner
GPS Collar
Satelite
Sending Data
Sending Data
We can see data any time,
If you can use internet.
GPS Collar Data
ＧＰＳ Ｃｏｌｌ
ａｒ Ｄａｔａ
Forest Area & Not Forest Area
Around Pasture Area
Forest Density
Forest Density & GPS points
Number of Point Density(n = 3918)
1200
1084 points
1000
800
600
400
200
127 points
0
10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
1084 points are located Forest Density 100% area.
Importance Of GPS Data
Thank you.
ARIGATOU.
ありがとう.
[email protected]