球磨川のシカ食害と斜面崩壊について

球磨川のシカ食害と斜面崩壊について

著者

森山 聡之, つる 詳子

雑誌名

福岡工業大学総合研究機構研究所所報

巻

3

ページ

35-38

発行年

2020-12-25

URL

http://hdl.handle.net/11478/00001587

⌫☻ᕝࡢࢩ࢝㣗ᐖ࡜ᩳ㠃ᔂቯ࡟ࡘ࠸࡚



_{᳃ᒣ ⪽அ}

_㸦

_{♫఍⎔ቃᏛ㒊♫఍⎔ቃᏛ⛉}

_㸧



ࡘࡿヲᏊ

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⮬↛ほᐹᣦᑟဨ⇃ᮏ┴㐃⤡఍

㸧



Feeding Damage Caused by Deer and Slope Collapse on Kumagawa River Basin

MORIYAMA Toshiyuki㸦Department of Socio-Environmental Studies , Facuity of Socio-Environmental Studies㸧 TSURU Shoko 㸦Nature interpreter association in Kumamoto㸧

Abstract

In the middle of the Kuma River, which runs through the southern part of Kumamoto Prefecture, deer damage has been notice- able in recent years. This time, among them, the Sakamoto district in Yatsushiro City (formerly Sakamoto Village) was damaged, to confirm the fact with visiting the same district.

As a result, it is expected that sediment production will increase, so flood risk will increase in the near future. Immediately, it is necessary comprehensive measures including engineering are considered. First of all, it was concluded that a survey of deer dynamic and a food damage were necessary as basic data for next step.

Keywords㸸IoT-DRR, Feeding Damage with Deer, River Network

 ࡣࡌࡵ࡟ ⇃ᮏ┴༡㒊ࢆὶࢀࡿ⌫☻ᕝࡢ୰ὶᇦ࡛ࡣࠊࡇࡇᩘᖺࢩ࢝ ࡢ㣗ᐖࡀ┠❧ࡗ࡚ࡁࡓࠋ௒ᅇࡣࠊࡑࡢ୰࡛ࡶࠊඵ௦ᕷᆏᮏᆅ ༊㸦ᪧᆏᮏᮧ㸧࡛⿕ᐖࡀ኱ࡁ࠸ࡇ࡜࠿ࡽࠊྠᆅ༊ࢆᅇࡗ࡚ࡑ ࡢ஦ᐇࢆ☜ㄆࡋࡓࠋ  ᪉ἲ  ᩥ⊩ㄪᰝ ከࡃࡢᩥ⊩ࡀ࠶ࡗࡓࡀࠊ࢖ࣥࢱ࣮ࢿࢵࢺ(㸯₎ࠊ₍㸰₎ࠊ₍㸱_)᭩⡠㸲ࠊ㸳 ࡛⾜ࡗࡓࠋ  ⌧ᆅ㋃ᰝ 2019 ᖺ 6 ᭶ 2 ᪥࡟ᆏᮏᆅ༊ࡢඵ❳ᒣࡸ❳ᓠᒣ࡛ணഛㄪᰝࢆ ⾜࡞ࡗࡓࠋᅗ㸯࡟ᑐ㇟ᆅ༊ࡢᆅᅗࢆ♧ࡍࠋඵ❳ᒣࡸ❳ᓠᒣࡣ ᅗ㸯ࡢᕥୖ࡟࡞ࡿࠋ  ⫈ࡁྲྀࡾ ➨ 2 ⴭ⪅ࡀࠊࢩ࢝ࡢ㣗ᐖ࡟㛵ࡋࠊ⇃ᮏ┴ᆏᮏ⊟཭఍ᆏ ᮏ᱈ᏊẶ , す㢪ᑎఫ⫋ ᒣᮏ㝯ⱥẶ , ࡸࡗࡕࢁࢺࣞ࢖ࣝࣛ ࣥࢽࣥࢢ࣓ࣥࣂ࣮,NPO ἲேỈ࡜࠸ࡁࡶࡢࢿࢵࢺ࣮࣡ࢡࡃࡲ ࡶ࡜ ḷᒸᏹಙẶ࠿ࡽ⫈ࡁྲྀࡾࢆ⾜ࡗࡓࠋ ᅗ㸯⌫☻ᕝ୰ୗὶ㒊 ࠕࣛ࢖ࢺ࣐ࢵࣉࣝ⇃ᮏ┴㐨㊰ᆅᅗࠖ᫛ᩥ♫ࠊ ࢆ࣮࣋ࢫ࡟฼⏝

Fig.1, Middle and lower Catchment Area of the Kuma-gawa River (Map is based on light Mapple road mao for Kumamoto pref.2011 published by Obunsha Co.Ltd)

᳃ᒣ ⪽அ㸪ࡘࡿ ヲᏊ



ᅗᔂቯࢆࡣࡌࡵ࡚࠸ࡿᩳ㠃㸦ᪧᆏᮏᮧ㸧 Fig.2, Slope which begin to collaspe.(Sakamoto town)



ᅗࢩ࢝ࡢ㣗ᐖ⑞㸦ᪧᆏᮏᮧ㸧 ࡇࡇࡣࡲࡔ᰿ࡇࡑࡂ㣗࡭ࡽࢀ࡚࠸࡞࠸ Fig.4, Mark of deer feeding.(Sakamoto town)

This place is not yet uprooted.

 ᅗࢩ࢝ࡢ㣗ᐖᚋࠊ⾲ᅵࡀὶฟࡋ࡚᰿ࡀ㟢ฟࡋ࡚࠸ࡿ

ᗈⴥᶞ㸦ඵ❳ᒣ㸧

Fig.6, Broad-leaved tree with exposed roots due to outflow of topsoil after the damage of deer feeding.(Mt.Hachiryu-zan)

 ⤖ᯝ  ᩥ⊩ㄪᰝ ࢩ࢝ၥ㢟ࡣ඲ᅜⓗ࡞ㄢ㢟࡛࠶ࡿࡀࠊ⌧≧࡛ࡣ㎰స≀ࢆⲨࡽ ࡋ࡚࠸ࡿࠊ㔪ⴥᶞࡢ๤⓶⿕ᐖ(㸯)_{ࡸᩳ㠃ᔂቯ࡛ὶධࡋࡓᅵ◁} ࡟ࡼࡾࠊἙᕝࡢ㨶㢮ࡢ⏕ែ⣔ࡀᙳ㡪ࢆཷࡅ࡚࠸ࡿ(㸰_)ࣞ࣋ࣝ ࡟Ṇࡲࡗ࡚࠸ࡿ࡜ᛮࢃࢀ࡚࠸ࡿࡼ࠺࡛࠶ࡿࠋ ୍᪉ࠊࢩ࢝ࡢ㢌ᩘ࡟㛵ࡋ࡚ࡣ⣅⢏ἲ࡛㢌ᩘࡢᢕᥱࡣ⾜ࢃࢀ   ᅗࢩ࢝ࡀዲࡲ࡞࠸ࢼࢳࢩࢲࡔࡅࡀ⦾ⱱࡋࠊ⏕ែ⣔ࡀᔂࢀ ࡚࠸ࡿ㸦ᪧᆏᮏᮧ㸧

Fig.3, Only pteris wallsichiana,which deer do not like,are overgrown and the ecosystem is collapsing.(Sakamoto Town)





ᅗࢩ࢝ࡢ㣗ᐖ࡟ࡼࡾᔂቯࡋࡓ㐨㊰ࡂࢃࡢᩳ㠃 ❳ᓠᒣ

Fig.5, Roadside slopethat collapsed due to the damage of deer feeding. (Mt.Ryuho-san)

ᅗࢩ࢝ࡢཱྀࡀᒆࡃୗⲡ࡜పᮌࢆ඲࡚㣗࡭࡚⌧ࢀࡓ'HHU /LQH❳ᓠᒣ  ྜ┠

Fig.7, Deer Line appeared by eating the all of undergrowth and shrubs.(Mt.Ryuho-san 5th station) ࡚࠾ࡾࠊ⌫☻ᕝ࿘㎶࡛ࡣ⣙27,000 㢌ࡢࢽ࣍ࣥࢪ࢝ࡀ⏕ᜥࡋ ࡚࠾ࡾࠊࡇࢀࢆ9,000 㢌࡟ῶࡽࡍィ⏬࡟࡞ࡗ࡚࠸ࡿ(㸱_{)ࠋࡲࡓࠊ} 㣗ᐖ࡟㛵ࡋ࡚ࡣࠊබⓗ࡞ㄪᰝࡣ࡞ࡉࢀ࡚࠸ࡿ(㸯)_{ࡀࠊ୺࡟㔪ⴥᶞᯘ} ࡟࠾ࡅࡿ๤⓶⿕ᐖㄪᰝ࡛࠶ࡾࠊᗈⴥᶞᯘࡣ⾜ࢃࢀ࡚࠸࡞࠸ ࡼ࠺࡛࠶ࡿࠋ

  '\QDPR'%   



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(㸰) Hikaru Nakagawa, Habitat changes and population dynamics of fishes in a stream with forest floor degradation due to deer overconsumption in its catchment area, J. of the Society for Biology, 2019.7,

https://conbio.onlinelibrary.wiley.com/doi/full/10.1111/csp2.71 , 2019.9.27 㜀ぴ (㸱) ⇃ᮏ┴ࠊ➨஧✀≉ᐃ㫽⋇⟶⌮ィ⏬㸦ࢽ࣍ࣥࢪ࢝㸧➨㸳ᮇࠊ2018.03 https://www.pref.kumamoto.jp/common/UploadFileOutput.ashx?c_id=3&id= 22917&sub_id=2&flid=154088, 2019.9.27 㜀ぴ (㸲)  㧗ᵳᡂ⣖ࠊࠕࢩ࢝ၥ㢟ࢆ⪃࠼ࡿ ࣂࣛࣥࢫࢆᔂࡋࡓ⮬↛ࡢ⾜᪉ࠖࠊ ࣐ࣖࢣ࢖᪂᭩ࠊ2015 (㸳㸧 ⁽㇂ṇ⩏㸸ࠕື≀࡟࡛ࡁࡿࡔࡅࡸࡉࡋ࠸ᧁ㏥ᶵࢆసࡿࠖࠊ࢖ࣥࢱ࣮ࣇ࢙࣮ࢫ 2019 ᖺ 9 ᭶ྕࠊpp.76-89ࠊ2019 (㸴㸧 ᳃ᒣ⪽அ࣭ࡘࡿヲᏊ㸸ࠕ⌫☻ᕝᆏᮏᆅ༊࿘㎶࡟࠾ࡅࡿࢩ࢝ࡢ㣗ᐖ࡜ᩳ㠃ᔂቯ࡟ࡘ ࠸࡚ࠖࠊᛂ⏝⏕ែᕤᏛ఍➨23 ᅇ◊✲Ⓨ⾲఍ㅮ₇㞟ࠊᗈᓥࠊ2019.9