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Portions of the ohia (Metrosideros polymorpha) forests on the windward slopes of Mauna Loa and Mauna Kea on the island of Hawaii began dying in 1952. Little mortality has occurred since 1972. About 50,000 ha are affected by the decline. Individual trees exhibit several symptoms, from slow…
Author(s): Charles S. Hodges, Ken T. Adee, John D. Stein, Hulton B. Wood, Robert D. Doty
Keywords: Armillaria mellea, Metrosideros polymorpha, Plagithmysus bilineatus, Phytophthora cinnamomi, decline, rainforest, Hawaii
Source: Gen. Tech. Rep. PSW-86. Berkeley, Calif.: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Exp. Stn. 22 p
Year: 1986
With about half the amount of water, subirrigated Metrosideros polymorpha Gaud. (Myrtaceae) grown 9 mo in a greenhouse were similar to those irrigated with an existing fixed overhead irrigation system; moss growth was about 3X greater in the fixed overhead system after 3 mo. Moss growth was…
Author(s): R. Kasten Dumroese, Jeremy R. Pinto, Douglass F. Jacobs, Anthony S. Davis, Baron Horiuchi
Keywords: irrigation, fertilization, Metrosideros polymorpha, Quercus, Picea, Acacia, Echinacea, electrical conductivity, Myrtaceae
Source: Native Plants Journal, Vol. 7(3):253–261
Year: 2006
We are successfully using subirrigation to grow a variety of native plants. Subirrigated plants have grown at least as well as their cohorts irrigated with a fixed or traveling overhead system, but with less water inputs, less discharge of waste water, and less discharge of nitrogen fertilizer. So…
Author(s): R. Kasten Dumroese, Douglass F. Jacobs, Anthony S. Davis, Jeremy R. Pinto, Thomas D. Landis
Keywords: irrigation, fertilization, Metrosideros polymorpha, Quercus rubra, Picea pungens, Acacia koa, Echinacea pallida, electrical conductivity, container
Source: In: Riley, L.E.; Dumroese, R.K.; Landis, T.D. National Proceedings: Forest and Conservation Nursery Associations - 2006. Proceedings RMRS-P-50. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 20-26
Year: 2007
A removal experiment was used to examine the restoration potential of a lowland wet forest in Hawaii, a remnant forest type that has been heavily invaded by non-native species and in which there is very little native species regeneration. All non-native woody and herbaceous biomass (approximately…
Author(s): R. Ostertag, S. Cordell, J. Michaud, T.C. Cole, J.R. Schulten, K.M. Publico, J.H. Enoka
Keywords: aboveground biomass, Metrosideros polymorpha, non-native species, nutrient cycling, productivity, resource availability
Source: Ecosystems 12: 503-515
Year: 2009
Forest fragmentation is a common disturbance affecting biological diversity, yet the impacts of fragmentation on many forest processes remain poorly understood. Forest restoration is likely to be more successful when it proceeds with an understanding of how native and exotic vertebrates utilize…
Author(s): David J. Flaspohler, Christian P. Giardina, Gregory P. Asner, Patrick Hart, Jonathan Price, Cassie Ka’apu Lyons, Xeronimo Castaneda
Keywords: Acacia koa, Area-sensitivity, Exotic birds, Hawaiian mid-elevation forests, Honeycreepers, Kipuka, LiDAR, Metrosideros polymorpha, Natural fragmentation
Source: Biological Conservation 143: 280–288
Year: 2010
The rust, Puccinia psidii, was first found on the leaves, stems and fruit of guava in Brazil in 1894 (Winter, 1984). As a result, it was first called guava rust. It has subsequently been identified in other countries of the western hemisphere including Paraguay in 1884, Uruguay in 1989, Puerto Rico…
Author(s): Philip G. Cannon, Acelino Couto Alfenas, Rodrigo Neves Graca, Mee-Sook Kim, Tobin L. Peever, Ned B. Klopfenstein
Keywords: guava rust, Puccinia psidii, ohia, Metrosideros polymorpha, Hawaii
Source: In: Adams, J., comp. Proceedings of the 57th Western International Forest Disease Work Conference; 2009 July 20-24; Durango, CO. Fort Collins, CO: Forest Health Technology Enterprise Team. p. 47-49.
Year: 2010
Damage to Hawaiian Acacia koa forest by Hurricane Iniki was assessed by comparison with our previous measures of stand structure and leaf area index (LAI) at sites along a precipitation/elevation gradient on western Kauai. Reductions in LAI ranged from 29 to 80% and were correlated with…
Author(s): Robin A. Harrington, James H. Fownes, Paul G. Scowcroft, Cheryl S. Vann
Keywords: Acacia koa, alien species, canopy, defoliation, Dodonaea uiscosa, leaf area index, litterfall, Metrosideros polymorpha, Psidium guajava, seedling recruitment
Source: Journal of Tropical Ecology 13(4): 539-558
Year: 1997
Population‐specific differences in the freezing resistance of Metrosideros polymorpha leaves were studied along an elevational gradient from sea level to tree line (located at ca. 2500 m above sea level) on the east flank of the Mauna Loa volcano in Hawaii. In addition, we also studied 8‐…
Author(s): P.J. Melcher, S. Cordell, T.J. Jones, P.G. Scowcroft, W. Niemczuzra, W. Giambelluca, G. Goldstein
Keywords: supercooling, freezing resistance, Metrosideros polymorpha, tree line, Hawaii, nuclear magnetic resonance, plasticity
Source: International Journal of Plant Science 161(3): 369-379
Year: 2000
The structure and functioning of Acacia koa-Metrosideros polymorpha forests between 1200 and 1800 m elevation on the island of Hawaii are being threatened by Passiflora mollissima, an aggressive introduced liana from South America. This study was done to evaluate the…
Author(s): Paul G. Scowcroft
Keywords: Acacia koa, Cibotium glaucum, decomposition, Hawaii, litter quality, Metrosideros polymorpha, nutrient cycling, Passiflora mollissima
Source: Journal of Tropical Ecology 13(3): 407-426
Year: 1997
We examined interactions between temperature, soil development, and decomposition on three elevational gradients, the upper and lower ends of each being situated on a common lava flow or ash deposit. We used the reciprocal transplant technique to estimate decomposition rates of Metrosideros…
Author(s): Paul G. Scowcroft, Douglas R. Turner, Peter M. Vitousek
Keywords: Hawaii, litter quality, Metrosideros polymorpha, tropical montane rain forest, site fertility, ecosystem development
Source: Global Change Biology 6(1): 73-85
Year: 2000