|
所属 |
岩手大学 農学部 森林科学科 |
|
職名 |
助教 |
|
生年 |
1990年 |
|
研究室 |
森林資源管理 |
|
メールアドレス |
|
|
研究分野・キーワード |
森林、林業、天然林 |
山崎 遥 (YAMAZAKI Haruka)
|
|
|
出身大学院 【 表示 ／ 非表示 】
-
2013年04月-2015年03月
北海道大学 環境科学研究科 生物圏科学専攻森林圏環境学コース 修士課程 修了
-
2015年04月-2019年09月
北海道大学 環境科学研究科 生物圏科学専攻森林圏環境学コース 博士課程 修了
取得学位 【 表示 ／ 非表示 】
-
北海道大学 - 修士（環境科学） 2015年03月
学位の分野 : 森林科学
-
北海道大学 - 博士（環境科学） 2019年09月
学位の分野 : 森林科学
可能な出前講義 【 表示 ／ 非表示 】
-
天然の森で林業をする [一般・高校生向け]
講義の概要
人が苗などを植えて作った人工林で行う林業と異なり、自然の力で出来上がった天然林で行う林業では「自然を守ること」と「木を切って木材を得ること」という、一見すると矛盾した2つを同時に行わなければなりません。普段あまり馴染みのない「天然林施業」について、技術や課題などについて基本的な部分を紹介します。
論文 【 表示 ／ 非表示 】
-
アカマツ林木の地上部サイズと葉量指数との関係: 若齢林と高齢林の比較
國崎 貴嗣，関原 芙美子，山崎 遥，白旗 学
岩手大学農学部演習林報告 ( 岩手大学農学部 ) 45 37 - 45 2014年06月 [査読有り]
その他（含・紀要） 共著・分担
アカマツ若齢林と高齢林を対象に，林木の地上部サイズ指標と葉量指数との関係を調べた。順序ロジスティック回帰分析の結果，若齢林では葉量指数の説明変数として樹高，枝下高，樹冠長率を含むモデルのAICが小さい傾向にあった。枝下高，樹冠長率が高いほど若齢林の林木葉量指数は高くなった。一方，高齢林では説明変数なしのモデルがAIC最小であった。
-
山崎 遥，國崎 貴嗣
日本森林学会誌 ( 日本森林学会 ) 96 ( 2 ) 117 - 120 2014年07月 [査読有り]
学術誌 共著・分担
冠雪害の発生傾向と林孔との関係を明らかにするために，2010年12月に岩手県滝沢演習林のスギ高齢林で発生した事例について Voronoi 多角形面積を用いて解析した。個体の存在した場所の斜面状態，形状比，樹形級， Voronoi 多角形面積を説明変数に用いてロジスティック回帰分析を行った結果，最良モデルには斜面状態，形状比， Voronoi 多角形面積が含まれた。最良モデルの係数から，傾斜地に存在し，Voronoi 多角形面積がより大きく，形状比がより高い個体の方が被害を受けやすいと判断された。また，傾斜地における被害木と健全木の平均形状比の差，平均 Voronoi 多角形面積の差に対するオッズ比は Voronoi 多角形面積で1.40であり，形状比の1.21より大きかった。ゆえに，冠雪害の発生を抑制する際，形状比のみならず林孔に関する指標にも注目すべきである。
-
Ippei ASADA, Haruka YAMAZAKI, Toshiya YOSHIDA
Forest ecology and management ( Forest Ecology and Management ) 393 81 - 88 2017年06月 [査読有り]
学術誌 共著・分担
Spatial patterns have been a major topic regarding natural regeneration of oak species, but the effects may differ considerably in sites subjected to intense forestry practices, which greatly alter many aspects of site conditions. We examined the hypothesis that the regeneration of oak (Quercus crispula Blume) following scarification (displacement of inhibiting vegetation and surface soil using machinery) is enhanced at a certain distance from a conspecific overstory tree, depending on the stage of development. We conducted both field surveys in scarification sites with different stand ages (1–16 year-old) and a laboratory seeding experiment to clarify factors contributing to its early establishment. The results demonstrate that the spatial relationship between the regeneration of oak and the conspecific overstory tree at scarification sites changes considerably among stages of the establishment. In the initial stage (0–1 years after the scarification), a location beneath the crown provided favorable conditions, whereas at subsequent stages (2–4 years), the distance-dependent effects were unclear, until eventually (8–16 years) a location outside the crown became more favorable. The condition produced by the scarification was basically competition-free and resource-rich, but it can also be harsh for acorns and small seedlings, imposing a requirement for shading to moderate the environment in the initial stage. Such an effect of facilitation was found also in the later (sapling) stage via the existence of neighbors of the other regenerated fast-growing species. The current findings supported the effectivity of a shelter-wood system, in which the regeneration starts from shaded condition followed by a gap status created by a successive felling. The area away from the conspecific crown would have a potential if acorns are plentifully supplied (e.g. by direct seeding) and they withstand the initial negative factors at the initial stage of development.
-
Tsuyoshi SATO, Haruka YAMAZAKI, Toshiya YOSHIDA
Journal of Forest Research ( Japanese Forest Society ) 22 ( 6 ) 336 - 342 2017年09月 [査読有り]
学術誌 共著・分担
Strong wind constitutes the major force behind disturbance of northern Japanese forests. Canopy gaps induced by disturbance are responsible for subsequent recovery of the stand (i.e. enhancement of growth and recruitment). There is also a possibility that a sudden change in stand structure, involving significant microclimatic alterations, results in further stand degradation. We therefore examined a hypothesis proposing that wind disturbance causes indirect and delayed negative effects on the demography of Abies sachalinensis, a dominant conifer species of northern Japanese natural mixed forests. Data for all trees in a 3-ha study stand with diameter at breast height ≥10 cm were recorded for over 10 years, including the period of severe wind disturbance induced by Typhoon Songda in 2004. We found that the total amount of dead A. sachalinensis in the post-disturbance period was equivalent to that in the wind disturbance. The mortality of the species was generally high in larger trees. Within 1–2 years immediately after the disturbance, dead trees frequently presented the uprooted form despite there being no record of strong winds, suggesting that the physical influence of the disturbance persisted. Moreover, these dead trees showed spatial association with trees in the surrounding trees that died due to strong wind. In contrast, most A. sachalinensis trees that died 3–8 years later showed growth reduction after the disturbance. We conclude that a strong wind disturbance can have long-term influence on the stand dynamics, during which the possible cause of tree deaths changes gradually from physical damage to physiological stress.
-
Toshiya Yoshida, Sayoko NAITO, Misato NAGUMO, Natsumi HYODO, Taiki INOUE, Hiromitsu UMEGANE, Haruka YAMAZAKI, Hisashi MIYA, Futoshi NAKAMURA
Sustainability ( Mary Ann Liebert Inc. ) 9 ( 11 ) 2093 2017年11月 [査読有り]
学術誌 共著・分担
The objective of forest management has become broader, and it is essential to harmonize timber production with conservation of the forest ecosystem. Selection cutting is recognized as a major alternative of clear-cutting, because it can maintain the complexity and heterogeneity of a natural forest; however, its long-term evaluations are limited. This study compared various attributes of stand structures, which are indicators of biodiversity and ecosystem carbon stock between managed and unmanaged blocks (12.6 ha area in total) in a natural mixed forest in Hokkaido, the northernmost island of Japan. We found that 30 years' implementation of single-tree selection did not affect the volume, size structure, species diversity nor spatial distribution of overstory trees in the managed stands. Also, the total carbon stock in the managed stands was almost equal to that of the unmanaged stands. In contrast, several structural attributes and indicator elements that are significant for biodiversity (such as large-diameter live trees, dead trees, cavities, epiphytic bryophytes, and some avian guilds) showed marked decrease in the managed stands. We conclude that it is required to leave these structures and elements to some extent for deriving the merit of the management as an alternative silvicultural regime in the region.
所属学協会 【 表示 ／ 非表示 】
-
2013年04月-継続中
日本森林学会
-
2013年04月-継続中
日本生態学会
-
2020年10月-継続中
東北森林科学会
-
2020年12月-継続中
日本森林技術協会