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Potential impacts of regional climate change on China fishery resources

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Title: Potential impacts of regional climate change on China fishery resources


1
???????????????? Potential impacts of regional
climate change on China fishery resources
Chen, Xue-zhong ??? Director, East China Sea
Fisheries Research Institute, Chinese Academy of
Fisheries Sciences ???????????????? 2011. 6
2
Contents of this talk ??
1 ?? Introduction 2 ????????????????????? To
review the potential impact of climate change on
the fish fisheries of China Seas. 3
????????????? Challenges Prospective 4
?????? Proposed cooperation
?
3
1 ?? Introduction
  • ???????????????????,??????????,???????????????????
    ?????????????
  • Ecological problems mainly caused by global
    climate change became apparent, including
    significantly changed species composition and of
    geographical distribution patterns of marine
    organisms, frequently happened coastal ecological
    disasters and severe recession of fishery
    resources...

4
1 ?? Introduction
  • ?????????????????,???????????
  • 2000???????????????????????154?,?????????43
    ?,????111?,????6894??,??????20??
  • 2000??????????????????973??80??,???????20?,?
    2010?????????973???????3.7?,????????????6??
  • The Chinese Government attaches great importance
    to global climate change National Science
    Foundation has launched a major research project
    - and its regional response to global change, the
    Ministry of Science and Technology launched 973
    Basic Research Program, and other related
    research projects.
  • Since 2000, 154 projects related to global
    climate change were funded by nation science
    foundation, including 43 key and major projects,
    and more than 20 projects were marine lelated.
  • Since 2000, more than 80 projected related to
    climate change were funded by 973 Basic Research
    Program, nearly 20 ocean-related. In 2010,
    Chinese government budgeted 3.7 hundred million
    to fund 973 projects related to global climated
    change, including 6 projects marine ralated.

5
2 ???????????????????? 2 Impacts of climate
change on the fish fisheries of China Seas
6
2.1 ??????????
2.1 SST change in the East China Sea
?1985??,?????????1.5 oC The East China Sea has
experienced a dramatic 1.5 oC warming since
1985.
7
2.2 ???????? 2.2 Effects on fish habitat
  • ???????????????????????,?50???,??????????????????
    ?????????????????,??????,?????????????????????????
    ???
  • The factors, which caused the coastal ecosystem
    unstable, is complicated. However, global
    climate change was one of the factors mainly
    responsible for unstable ecosystem . During the
    last five decades, Chinese coastal ecosystem has
    experienced a regime shift under the multiple
    stresses. The increasing frequency of ecological
    disasters including harmful algae blooms and
    jellyfish outburst have been observed. These
    have made the recession of fishery resources in
    China seas intensified .

8
(No Transcript)
9
???????????? East China Sea and fishing ground
????? Circulation in the East China Sea
???????
10
2.3 ?????????? 2.3 Effects on zooplanktonic
community structure
  • ??????? (??????Euphausia pacifica ??????Calanus
    sinicus)????
  • Abundances of temperate warm temperate
    species, such as Euphausia pacifica, Calanus
    sinicus have decreased
  • ???????????
  • Abundances of warm water species have
    increased
  • ?????????
  • Total biomass and abundances of zooplankton
    have decreased.

11
??1 ????????? case 1 effects on Euphausia
pacifica
North retreat of its distribution and decrease in
abundance.
Table Yearto-year variation in abundance of
Euphausia pacifica in spring of northern East
China Sea
?? Year ?? data ??? stations ?? ?? ST ?? ?? BT ?? ??MA ?? Abundance ???OF
1959 5.11-15 28 17.32 16.78 14.00 1.91 55.56
1974 May 9 17.34 16.98 7.83 1.64 77.78
2002 4/25-5/2 27 19.53 19.08 4.51 0.36 25.93
2003 5/1-5/11 23 18.95 18.15 0.30 0.02 13.04
2004 5/8-6/3 37 18.34 17.42 0.69 0.04 5.41
2005 4/27-5/18 37 18.90 17.24 0.00 0.00 0.00
2006 5/13-6/3 37 17.82 16.79 0.38 0.01 2.70
2007 5/20-5/28 20 18.93 17.25 0.00 0.00 0.00
note ST, surface temperature BT, bottom
temperature A average abundance
(individuals/m3)
12
??2 ????????? case 2 effects on Calanus sinicus
  • ??????????????????????????,?????????????,?????1959
    ???6????2005???5?,???????????????????????

Calanus sinicus was the predominant zooplankton
in East China Sea. Its abundance decreased
greatly because of sea warming, particular in
spring. The ending of maximum abundance of the
sp. is earlier (in May) than used to be (in
June), which expected to be have negative effects
on the larvae and juvenile of some commercially
important species.
13
2.4 ?????????? 2.4 Effects on fish migration
  • ?????????,????????,????????????????,??????????????
    ?
  • When El Nino occurred, the Kuroshio Current would
    be strengthened, which made the over wintering
    ground of hairtail inhabiting in the Yellow Sea
    and East China Sea swift to the offshore of East
    China Sea.

14
???? 2000??? El Nino, winter of 2000
15
2.4 ????????????????????????? 2.4 Effects on fish
migration
???????? monthly distribution of small yellow
croaker
??????????????? ? 5-6?,?????????????????????.
?spring

?????????????? Migration routes of the small
yellow croaker in the Bohai, Yellow, East China
Seas
??????? Distribution pattern of Calanus sinicus
16
2.4 ?????????? 2.4 Effects on fish migration
??,???????????????????60??????(Pseudosciaena
polyactis )??????,70???????????????70??,??????????
?,???????????????????,???????????????????????????,
???????????,???????????????????????????,??????????
???50????????????,???????????????????????????????
The dynamics of small yellow croaker stocks are
complicated. In the 1980s, overfishing led to
depletion of the small yellow croaker stock in
the East China Sea. To protect the fishery
resource, China government has then practiced
summer fishing moratorium system in the East
China Sea annually. An evident increased was
observed in the catches of small yellow croaker
in East China Sea. In the meanwhile, the small
yellow croaker stocks in Bohai Sea and East Sea
(Sea of Japan) have not recovered. In the East
China and Yellow Sea, the stocks of small yellow
croaker increased significantly, even higher than
in the 1950s. Studies on he recovery mechanisms
of the species is in process.
17
Annual variations of small yellow croaker catch
in China, Japan and Korea
18
2.4 ?????????? 2.4 Effects on fish migration
2001-2009?????????(??) Catches of fisheries from
the China seas (unit 10 thousands tons)
19
3 ????????????? 3 Challenges Prospective
  • ???????,????????
  • Life histories of fish was complicated, most
    of them are migrated species.
  • ???????????????????
  • Monthly data on large scale of fish and
    fishery is difficult to obtained.
  • ????,?????????????????
  • Effects of fishing on the fish and fisheries
    is not easy to excluded.

20
3 ?????????? Challenges Prospective
  • 1)?????????????
  • ????????????EL Nino?????????(PDO)????
  • 2)?????????????????
  • ?????????????????????????????????
  • 3)????????????????
  • ????????????????????????????????
  • 4)?????????
  • ????????,?????????????

21
3 ?????????? Challenges Prospective
  • Effects of global warming on temporal and spatial
    evolutions of ocean circulation
  • Analyzing the influence of EL Nino and
    PDO on hydrodynamic environment of China seas.
  • impacts of global warming in forming the fishing
    grounds
  • Analyzing the effects of global warming
    on the abundance of key food organisms of
    fishery species, migratory pattern and aggregate
    behavior of specified species.
  • Assessment of influence of global warming on
    fishing grounds
  • Analyze how the fishery species and
    their food organisms in fishing grounds respond
    to the variation of ocean currents.
  • Forecast work of fishing condition in the Yellow
    and East China Seas
  • Making medium-range forecasting of
    fishing condition by forecasting model.

22
4 ????????? proposed cooperation
  • 1)???????????????????????
  • ?????????????????????????????????????,??????
    ??????????????????,???????????????????????,???????
    ??????,??????????????,????????????????????????????
    ???
  • 1) Effects of global climate change on oceanic
    commercially important species
  • Spatial-temporal distribution patterns of
    oceanic commercially important speciesEcological
    characteristics of fish habitat in Pacific Ocean
  • Key ecological factors that regulate the
    changes in fishing ground
  • Different mechanisms of these oceanic
    species Response to global climate change.

23
4 ????????? proposed cooperation
  • 2)??????????????????????
  • ??????????????????,????????????????(??)???
    ????????????????,???????????????????????????,?????
    ???????????????????
  • 2)Population dynamics of Euphausia pacifica , and
    its response mechanisms to global climate change
    (in theory).
  • Euphausia pacifica was widely distribution
    in the coastal areas of the Pacific. The species
    was import food for some fishes. For the impact
    of climate change, the sp. has north retreat of
    East China Sea. The potential effect of the
    changes in geographic distribution of the sp. on
    fish and fishery should studied in the future,
    and we suggest to take a cooperation on the
    subject.

24
4 ????????? proposed cooperation
  • ??????????????????????????????
  • ?????????????????????????????(????????????)
  • ?????????????????????????????????????????
  • ????????????????????????????????????,???????(D
    NA)?????

25
4 ????????? proposed cooperation
3) Combined effects of Ocean acidification and
ocean warming on the biochemical composition and
breeding of economic fish from the East Sea of
China. The coupling effect ocean warming
and ocean acidification on the ocean species
composition of photosynthetic organisms (the
ratio of addicted to carbon species and nitrogen
species). The coupling effect seawater
warming and ocean acidification on the growth and
biochemical composition of some economy fish.
The coupling effect seawater warming and ocean
acidification on the reproduction capacity of
economy fish.
26
? ?! Thank you for your attention!
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