自然再生事業とバイオマス利用事業の 失敗事例の収集と要因解析

ICSS-Asia 2009, Session 3 “Urban-Rural” (16:30-18:30, Nov.23, 2009)
Urban-Rural Development and
Associated Changes in Ecosystem
Services in Japan
Osamu Saito
Waseda Institute for Advanced Study
Waseda University
Outline
I. Satoyama and its Ecosystem Services
II. How Satoyama has changed?
III.Urban-Rural Linkage: Risks, Opportunities,
and Trade-offs
IV.Some Leading Actions:
1. Furano, Hokkaido
2. Nasu, Tochigi
3. Motegi, Tochigi
V. Implications for Urban-Rural Sustainability
2
I. Satoyama and its Ecosystem Services
 Satoyama can be defined as dynamic social-ecological coupled
landscapes comprising of a mosaic of different ecosystem types
producing synergy of a bundle of ecosystem services for human
wellbeing.
 Characteristics of Satoyama are followings:
- Satoyama is a mosaic composed of various types of ecosystems
including farmlands, forests, irrigation ponds and ditches,
grasslands and pasture.
- From Satoyama, local dwellers have traditionally harvested
various resources (ecosystem services) in a sustainable way.
- Biodiversity in Satoyama is key elements to provide a bundle of
ecosystem services.
- The spatial structure and patterns in the mosaics are diverse
with each social, economic, and ecological contexts.
3
4
Ecosystem Services:
The benefits people obtain from ecosystems (MA, 2003)
Focus: Consequences of Ecosystem Change for Human
Well-being
MA Framework
Human Well-being and
Poverty Reduction





Basic material for a good life
Health
Good Social Relations
Human
Security
Freedom of choiceWell-being
and action
Indirect Drivers of Change
 Demographic
 Economic (globalization, trade,
market and policy framework)
 Sociopolitical (governance and
Indirect framework)
institutional
 Science
and Technology
Drivers
 Cultural and Religious
Direct Drivers of Change
Ecosystem
Services







Changes in land use
Species
introduction or removal
Direct
Technology adaptation and use
Drivers
External
inputs (e.g., irrigation)
Resource consumption
Climate change
Natural physical and biological
drivers (e.g., volcanoes)
Sub-Global Assessments (SGA)
•Multi-scale assessment
– Includes information from 33 sub-global assessments
Japan
(2007-10)
Ecosystem Services from Satoyama
Provisioning
Services
Regulating
Services
-
- Climate control (in
- Nutrient cycling
Japan)
- Groundwater
- Local air quality
supporting
control
- Carbon storage, etc.
- Flood control
- Erosion control
- Landslide control
- Water quality control
- Water filtration
- Control of wild
animals Population
- Pest control
- Habitat for migrating
birds
- Pollination control
- Buffering against
acid rain and dust, etc.
-
Rice
Sake
Fish
Wild edible plants
Charcoal
Bamboo shoots
(takenoko)
Mushrooms (e.g.
Matsutake, Shitake)
Genetic resources
Medicinal plants
Berries
Bush meat
Timber
Water, etc.
Based on the PPT slide prepared for Sub-global Assessment of
Satoyama and Satoumi in Japan by UNU-IAS (18 November 2008)
Supporting
Services
Cultural Services
- Eco-tourism
- Traditional
knowledge
- Symbols and heritage
of Japanese culture
- Spiritual monuments
and objects (e.g.
temples, mountains)
- Folklore
- Festivals
II. How Satoyama has changed?
People
45,000
Population index (2000=100)
Population (1,000 people)
40,000
35,000
U.S.A.
Tertiary Industry
140
120,000
N.Z.
NorwayTotal
Population
120100,000
30,000
U.K.
80,000
100
25,000
20,000
15,000
10,000
Projection
Germany
60,000
Secondary Industry
80
Japan
40,000
60
34%
Over 65
yeas old
20%
20,000
5,000
5%
2035
1965
1960
1955
1950
Primary Industry
0
Population Ratio of Over 65 Yeas Old
(2005)
1940
1930
10%
1950
1955
1970
1960
1920
1965
1975
1930
1970
1940
1980
1975
1950
1980
1985
1960
1985
1990
1970
1990
1975
1995
1995
1980
2000
2000
2005
1985
2010
1990
2005
2015
1995
2020
2000
2025
2005
2030
2010
2035
2015
2040
2020
2045
2025
2050
2030
40
0
1920
The number of employed persons (1,000 persons)
Population change and projection
Trend of employed
persons
by industry
Population change
and projection of Japan
160
(1920-2005)
140,000
(Source) UN, World Population Prospects: The 2006
http://www.stat.go.jp/data/kokusei/2005/kihon1/00/02.htm
10
Globalization
Trend of Japanese self-sufficiency ratio
100
80
62
60
Fishery products
41
40
Food
(calorie basis)
24
Timber
20
2008
2007
2006
2005
2004
2003
2002
2001
2000
1995
1990
1985
1980
1975
1970
1965
0
1960
Japanese self-sufficiency ratio (%)
120
11
Land
日本の農地面積の推移
Trend of Farmland in Japan
200
7,000
150
6,000
100
Total farmland
Farmland
utilizaiton ratio
5,000
50
4,000
Annual expansion of farmland
0
3,000
-50
2,000
農地の拡張面積
農地のかい廃面積
-100
耕地面積計 Total farmland (1,000ha)
農地の拡張・かい廃面積 (1,000ha/year) ・ 耕地利用率
Annual expansion and conversion of framland
- Utilization ratio
(農林水産省,2009)
1,000
耕地利用率
Annual conversion of
farmland
耕地面積計
2006
2004
2002
2000
1998
1996
1994
1992
1990
1988
1986
1984
1982
1980
1978
1976
1974
1972
1970
1968
1966
1964
1962
1960
1958
0
1956
-150
1.耕地利用率は、耕地面積に対する作付け延べ面積の割合である。
2.拡張・かい廃面積は、各年次とも、前年の調査日から当年の調査日の前日までの間に生じたものである。
12
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
農地面積 Arable land (1,000ha)
Land
5,000
2,000
日本の耕地種類別の面積推移
Trend of arable land by type of field
(農林水産省,2009)
7,000
6,000
Pasture
Orchard
4,000
Field
特殊田:水稲以外のたん水を必要とする作目(レンコン等)の栽培を状態とする田
45%
3,000
牧草地
樹園地
普通畑
特殊田
普通田
Rice paddy
55%
1,000
0
13
耕作放棄地面積の推移
Trend of abandoned former arable land
(農林水産省・農林業センサス)
Unit:10,000ha
10% of the
total arable
land
1975
1980
1985
1990
1995
2000
2005
14
Abandoned arable land by region type
農業地域類型別の耕作放棄地面積
Region Type
Total arable land
(ha)
農業地域類型
経営耕地
総面積(ha)
Abandoned arable land (ha)
Ratio
(%)
耕作放棄地面積計
耕作放棄率
(ha)
全国 (National total)
(%)
(%)
3,693,026
385 791
100.0
10.4
525,695
79 975
20.7
15.2
Flat rural area
平地農業地域
1,771,409
98 272
25.5
5.5
Intermediate rural area
中間農業地域
1,027,105
146 798
38.1
14.3
Mountainous rural area
山間農業地域
368,817
60 747
15.7
16.5
Urban area
都市的地域
(農林水産省,2008)
(注) 耕作放棄率=耕作放棄地面積/経営耕地総面積
15
Dominant causes for biodiversity loss in Japan
90
82
Development of lake, river and pond
80
70
60
50
Coastal and marine development
67
47
Alien species
Road construction
Coniferous
plantation
Dam construction
44
49
41
40
37
32
30
28
26
28
34
29
25
22
18
20
18
10
10
6
10
6
7
4
0
森
林
伐
採
人
工
林
へ
の
転
換
湖
沼
沿
岸
・ の
河 開
川 発
・
湿
原
の
開
発
Clearing forest
草
地
の
開
発
都
市
開
発
ゴ
ル
フ
場
・
ス
キ
ー
場
の
造
成
観
光
開
発
道
路
建
設
ダ
ム
建
設
園
芸
狩
猟
森
林
・ ・ の
観 漁 管
賞 獲 理
放
・
薬
棄
用
の
捕
獲
採
取
草
地
の
管
理
放
棄
耕
作
放
棄
狩
猟
圧
の
低
下
動
物
に
よ
る
食
害
外
来
生
物
の
影
響
農
薬
水
質
・ 汚
化 濁
学
物
質
に
よ
る
汚
染
Woodland and grassland
abandonment
窒
素
の
蓄
積
地
球
温
暖
化
そ
の
他
要
因
(
環・
境負
省荷
指
・
自標
然に
研関
、す
一
五る
〇有
人識
者
分
ア
、ン
5
択ケ
)ー
ト16
Expansion of golf course construction in the Tokyo MA
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00 12.5
50
75
100
nn
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12.5 25
25
50
75
100
.
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00 12.5
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2008
1990
2000
1950
1970
1980
1960
50
75
50
75
50
75
Highway
Highway
Highway
Highway
Highway
Shinkansen
Shinkansen
Shinkansen
Shinkansen
Shinkansen
Prefectures
Prefectures
Prefectures
Prefectures
Prefectures
2008:
Over 800
courses in
Tokyo MA
Highway
Shinkansen
Prefectures
Golf courses
100
100
100
17
III. Urban-Rural Linkage: Risks, Opportunities, and
Trade-offs
Opportunities:
Risks:
• Losing vitality of rural communities
• Expanding abandoned arable land and
woodland
• Degradation of ecosystem services and
biodiversity loss
• Expanding damage son agriculture and
forestry by wild animals (deer, wild boar,
etc)
• Maintaining rural infrastructures
including road, dam, tunnels, bridges,
sewage, school, hospital, etc.
Trade-offs:
• Revitalizing rural communities through
urban-rural interaction
• Transforming to compact city
• Nature restoration
• Creating new industries for elderly
(retired) population
• Utilize abandoned farmland and forest
stock for energy, material use and
carbon stock
• Sustainable tourism
• Grass roots conservation activities
• Urban-rural: Realize development of compact city at the expense of further depopulation of
rural areas
• Within region: Over exploitation and destruction of rural ecosystem by promoting green
tourism, expanding renewable energy
• Inter-regional: Widening regional differences. Only limited number of leading regions can
maintain their vitality while the rest are losing it in the long run
• International: Keep on depending on imported resources while there are abundant forest stock
and arable land
• Lags between social and ecological responses
18
Trade-offs of urban-rural interaction and development (U-WILL)
Inter-regional to country scale
3
Regional (basin) scale
Other Regions
Other
countries
1
4
Urban Area
(Downstream)
5
2
Rural Area
(Upstream)
Lags between social and ecological responses
1. Urban-rural: Realize development of compact city at the expense of further depopulation of rural
areas
2. Within region: Over exploitation and destruction of rural ecosystem by promoting green tourism,
expanding renewable energy
3. Inter-regional: Widening regional discrepancy. Only limited number of leading regions can improve
and maintain their vitality while the rest are losing it in the long run
4. International: Keep on depending on imported resources while there are abundant forest stock and
arable land
5. Lags between social and ecological responses
19
Examples of tradeoff within region
2
Within region
(a) Lose-Lose: Unrestrained ecotourism can lead to infrastructure
and human traffic that degrades many ecosystem services, and
ecotourism itself collapses.
(b) Win-Win: Ecotourism develops with good management of
biodiversity and ecosystem services, so that income flows from
tourism, biodiversity is enhanced, and ecosystem services are not lost.
(c) Win-Lose (tradeoff): Ecotourism develops and biodiversity is
protected in nature reserves, but the increase in roads and hotels
undermines water quality and fisheries, causing tradeoffs among
ecosystem services and development.
(Source) Tallis et al. (2008)
20
IV. Some Leading Actions
4-1 Furano, Hokkaido lead by NPO
Forest restoration ×Green tourism ×
Environmental education and training
4-2 Nasu, Tochigi lead by Private
company
Pasturing in abandoned woodland ×
Valued-added dairy products × Forest
products including non-timber forest
products × Green tourism × Education and
training
4-3 Motegi, Tochigi lead by Town
Composting of food waste, wood residues
and leaves ×Local resource circulation ×
Farmers market × Community
revitalization
21
4-1. Environmental Program NPO C.C.C. Furano Field
• In 2005 when Furano Prince Hotel golf course was closing down, Soh
Kuramoto, the chair man of C.C.C. (Creative Conservation Club),
proposed to return it to the former forest it once was.
• Now, the club uses the site for two purposes - firstly, restoring the forest
and secondly, promoting environmental education within the project site.
2005
2006
2007
2008
May 6 First tree planted in closed golf course
Oct 15 Publicly announced to the Press and the Media
Trees planted:1,087
Apr 3 NPO establishment registered
Jun 1 Beginning of Environmental program
Visitors:1,056
Trees planted:10,226
Visitors:3,205
Trees planted:10,399
Visitors:2,800
Trees planted:7,658
Total number of trees planted thus far:29,370
(Source) http://furano-shizenjuku.yosanet.com/english.html
22
(Source) http://furano-shizenjuku.yosanet.com/english.html
23
4-2. Creating “Natural Industry” in Nasu by Amita Corp.
Woodland pasture
Crops
Milk
Abandoned woodland
Millet
Farmland
Milk
Ice cream
Consumers/ Supporters
(Source) http://www.shinrinno.jp/contents/farm/nasu.html
Cafe
24
4-3. Midori Compost Center in Motegi
Wood residues
To Midori Compost Center
Household
food waste
Leaves of
deciduous
woodland
Animal waste
Sell compost to
local farmers
(Source)栃木県茂木町(2006)美しい土の里から.
Sell agriproducts to
local market
25
VI. Implications (ABCDE) for Urban-Rural Sustainability
Avoid uniform and ad hoc management
→ Diverse, dynamic, and
long-term commitment
Balance between over-use (development) and under-use
(abandonment)
→ Determine the appropriate management level through
collaborative discourse-based planning in each rural area
Create a new commons and players to take care of it
Discover local resources and connect different sectors and various
players
Doing by leaning: Realize scientific assessment and monitoring and
provide feedback to planning and management → Adaptive
management
Establish a standard set of measures and approaches for quantifying
and monitoring ecosystem service levels and values (Tallis et al. 2008)
26
The End
Woodland pasture in Nasu
27