globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.foreco.2016.06.026
Scopus记录号: 2-s2.0-84977134556
论文题名:
Assessing spatial distribution, stand impacts and rate of Ceratocystis fimbriata induced ‘ōhi‘a (Metrosideros polymorpha) mortality in a tropical wet forest, Hawai‘i Island, USA
作者: Mortenson L.A.; Flint Hughes R.; Friday J.B.; Keith L.M.; Barbosa J.M.; Friday N.J.; Liu Z.; Sowards T.G.
刊名: Forest Ecology and Management
ISSN:  0378-1127
出版年: 2016
卷: 377
起始页码: 83
结束页码: 92
语种: 英语
英文关键词: Ceratocystis ; Forest pathology ; Hawai‘i ; Invasion ; Metrosideros polymorpha ; ‘Ōhi‘a
Scopus关键词: Population statistics ; Reforestation ; Ceratocystis ; Forest compositions ; Invasion ; Metrosideros polymorpha ; Non-native species ; Research plots ; Seedling recruitment ; Tropical wet forest ; Forestry ; assessment method ; basal area ; dieback ; evergreen tree ; fungus ; mortality ; pathogenicity ; pathology ; regeneration ; seedling ; spatial distribution ; tropical forest ; Hawaii [United States] ; United States ; Ceratocystis ; Ceratocystis fimbriata ; Fungi ; Metrosideros polymorpha
英文摘要: Pests or pathogens that affect trees have the potential to fundamentally alter forest composition, structure and function. Throughout the last six years, large areas of otherwise healthy ‘ōhi‘a (Metrosideros polymorpha) trees have been dying rapidly (typically within weeks) in lowland tropical wet forest on Hawai‘i Island, USA. This mortality is quite distinct from previous well-documented ‘ōhi‘a dieback episodes driven by cohort senescence. Ceratocystis fimbiata was identified and routinely found associated with rapidly dying individuals of ‘ōhi‘a, Hawai‘i's most widespread native tree. Pathogenicity of this fungus was proven and M. polymorpha was recorded as a new host for C. fimbiata. Mortality of ‘ōhi‘a at this scale is of great concern as the understory in these forests is often occupied by invasive non-native plants capable of severely limiting ‘ōhi‘a regeneration. Imagery of ‘ōhi‘a mortality obtained in 2012 revealed large expanses of greater than expected mortality (i.e., ≥10%) across 1600 ha. By 2014 ‘ōhi‘a mortality levels ≥10% had spread to 6403 ha, or 30% of total area classified as ‘ōhi‘a in our study area. Further, levels of ‘ōhi‘a mortality in field plots established within the study region averaged 39%, and mortality levels were comparable across size classes and forest compositions. Results from a subset of field plots re-inventoried one year after plot establishment revealed average annual ‘ōhi‘a mortality rates of 24% and 28% based on basal area and stem density measures, respectively; mortality rates were as high as 47% in some field plots. The dearth of ‘ōhi‘a seedling recruitment and characteristic understory dominance of non-native species documented within our research plots, coupled with the lethality of C. fimbriata to ‘ōhi‘a, suggest that these forests likely will be dominated by non-native species in the future. © 2016
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64782
Appears in Collections:影响、适应和脆弱性

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作者单位: USDA Forest Service, Pacific Southwest Research Station, Placerville, CA, United States; USDA Forest Service, Institute of Pacific Islands Forestry, Hilo, HI, United States; University of Hawai‘i at Mānoa Cooperative Extension Service, Hilo, HI, United States; USDA Agricultural Research Service, Hilo, HI, United States; Department of Global Ecology, Carnegie Institution for Science, Stanford, CA, United States; Dartmouth College, Hanover, NH, United States; Tetra Tech Inc., Contractor for USDA Forest Service, State and Private Forestry, Vallejo, CA, United States

Recommended Citation:
Mortenson L.A.,Flint Hughes R.,Friday J.B.,et al. Assessing spatial distribution, stand impacts and rate of Ceratocystis fimbriata induced ‘ōhi‘a (Metrosideros polymorpha) mortality in a tropical wet forest, Hawai‘i Island, USA[J]. Forest Ecology and Management,2016-01-01,377
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