Litter production and decomposition from an overstorey of <i>Eucalyptus</i> spp. on two catchments in the New England region of New South Wales

Pressland, AJ

doi:10.1111/j.1442-9993.1982.tb01590.x

Cited by 38 publications

(21 citation statements)

References 17 publications

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“…Such seasonality is to be expected given the seasonal pattern of leaf-fall in eucalypt forests (Pressland, 1982;Lake, 1982). Many workers have reported seasonal variation in BOM standing stocks in a variety of streams (e.g.…”

Section: Temporal Changes In Bommentioning

confidence: 99%

“…In many temperate Australian stream catchments, Eucalyptus species predominate and shed their leaves primarily during summer (Pressland, 1982). Consequently, many Australian streams presumably receive a pulse of leaf detritus when discharges are low and water temperature is high, in contrast to autumnal litter input in northern hemisphere deciduous forest streams (Lake, 1982;Bunn, 1986).…”

Section: Introductionmentioning

confidence: 99%

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Benthic organic matter and detritivorous macroinvertebrates in two intermittent streams in south-eastern Australia

Boulton

Lake

1992

Hydrobiologia

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Temporal changes in coarse (> 1 mm), fine (< 1 mm, > 250 pm), and woody benthic organic matter (BOM), and densities of detritivores in pools and riffles were monitored at three sites on two intermittent streams (Werribee and Lerderderg Rivers) in Victoria, Australia during a drought year followed by a wetter year. Standing stocks of BOM peaked in both habitats during summer when discharge ceased and eucalypt leaf fall was greatest. During high winter and spring discharges, concentrations of BOM were low. Floods did not always scour BOM from the pools and riffles; after floods in October, standing stocks rose when BOM was imported from upstream or mobilized from the riparian zone. Densities of benthic detritivores, collector-gatherers, and shredders also varied seasonally, usually peaking in summer. Correlations between detritivore feeding group densities and amounts of putative food resource were habitat-specific. There were few significant correlations in depositional habitats, even after incorporating lag-times of two and four weeks into the analysis. However, detritivore densities in riffles, especially in the Lerderderg River, were strongly positively correlated with the amounts of BOM. Possibly, physicochemical conditions in riffles are more conducive to litter conditioning and invertebrate colonization and breakdown of leaf material than are those in pools.

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Section: Temporal Changes In Bommentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Benthic organic matter and detritivorous macroinvertebrates in two intermittent streams in south-eastern Australia

Boulton

Lake

1992

Hydrobiologia

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“…Australian forested catchments are dominated by Eucalyptus species whose litter-fall is mostly leaf material (Maggs & Pearson, 1977) and seasonal, occurring primarily over the summer months (Pressland, 1982). Thus, many Australian streams receive a pulse of litter-fall at a time of low discharges and high water temperatures, in contrast to the autumnal litter input into streams draining northern hemisphere deciduous forests (Lake, 1982;Bunn, 1986).…”

Section: Introductionmentioning

confidence: 99%

Eucalypt leaf decomposition in an intermittent stream in south-eastern Australia

Boulton

1991

Hydrobiologia

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Eucalypt leaf packs were placed at two sites in an intermittent stream during summer to examine the hypothesis that terrestrially-exposed leaflitter accumulates a richer microbial flora than submerged leaves -a phenomenon observed in Canadian temporary vernal pools. This did not occur; during the experiment, microbial biomass (as ATP) rose steadily on submerged leaves but remained low on terrestrially-exposed leaves. Densities of most functional feeding groups on the submerged leaves increased with time. Scrapers appeared to be more important than shredders in eucalypt leaf breakdown at both sites.

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“…Esté fenómeno podría contribuir a la disminución de la actividad microbiana, afectando finalmente el proceso de descomposición de hojarasca. En este sentido, nuestro estudio coincide con trabajos previos que han registrado bajas tasas de descomposición en plantaciones quemadas de eucalipto [29,30]. Si esta interpretación es correcta, se podría suponer que esta disminución de las tasas de descomposición podría estar restringida a los meses de verano en los que la falta de lluvia exacerba el déficit hídrico en el suelo.…”

Section: Discussionunclassified

Efectos del fuego sobre la estructura, microclima y funciones ecosistémicas de plantaciones de eucalipto (Eucalyptus globulus; Myrtaceae) en el Distrito Metropolitano de Quito, Ecuador

Anchaluisa

Suárez

2013

Av. Cienc. Ing. (Quito)

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The replacement of remnant native vegetation with species of economic value is one of the most important impacts of the expansion of urban centers. An example of this phenomenon is the establishment of plantations of eucalyptus (Eucalyptus globulus), an Australian species that currently dominates large areas around cities in Spain, Portugal, and North and South America. Being a species which structure and behavior (e.g. rapid litter accumulation, bark shedding, volatile compounds) facilitates the spread of fire, eucalyptus plantations are prone to intense fires which impacts on native habitats have not been comprehensively evaluated. In this study, we analyzed the impacts of fire on the structure, microclimate and ecosystem functioning in three eucalyptus plantations and a native scrubland site in the Quito Metropolitan District (Ecuador). In each plantation, we located an intact plot, and an adjacent plot that had been burned in the summer of 2012. Our results show a clear impact of fire on average canopy cover, which was significantly lower in the burned plots, and a consistent response of the microclimate of these plantations, which experienced higher soil temperatures. Despite warmer temperatures, litter decomposition in the burned plots was significantly slower than in the intact plots and in the native scrubland, an effect that we attribute to the desiccation of soil and the resulting inhibitions of decomposers activity. We also report high rates of accumulation of litter and other flammable materials in eucalyptus stands, a factor that emphasizes the permanent fire risk that characterizes these plantations. Future protection and management initiatives should promote the progressive elimination of introduced eucalyptus plantations and the restoration of native vegetation that is less prone to fires.Keywords. Eucalyptus plantations, fire, impacts of fire, Ecuador, introduced species. ResumenUno de los principales impactos de la expansión urbana es el remplazo de los remanentes de vegetación nativa con especies exóticas de valor comercial. Un ejemplo notable de este fenómeno es la introducción de plantaciones de eucalipto (Eucalyptus globulus), árbol nativo de Australia que actualmente domina grandes extensiones en los alrededores de muchas ciudades en la península ibérica, y en el norte y sur de América. Al ser una especie cuya estructura y comportamiento (por ejemplo, rápida acumulación de hojarasca, desprendimiento de cortezas, aceites volátiles) favorece la propagación del fuego, las plantaciones de eucalipto son propensas a experimentar grandes incendios cuyos efectos en los hábitats nativos aun no han sido integralmente evaluados. En este estudio analizamos el efecto del fuego sobre la estructura, microclima y funciones del ecosistema en tres plantaciones de eucalipto y un sitio de matorral nativo en el Distrito Metropolitano de Quito (Ecuador). En cada plantación de eucalipto se ubicaron una parcela intacta y una parcela adyacente que había sido incendiada durante el verano del año 2012. Nuest...

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Litter production and decomposition from an overstorey of Eucalyptus spp. on two catchments in the New England region of New South Wales

Cited by 38 publications

References 17 publications

Benthic organic matter and detritivorous macroinvertebrates in two intermittent streams in south-eastern Australia

Benthic organic matter and detritivorous macroinvertebrates in two intermittent streams in south-eastern Australia

Eucalypt leaf decomposition in an intermittent stream in south-eastern Australia

Efectos del fuego sobre la estructura, microclima y funciones ecosistémicas de plantaciones de eucalipto (Eucalyptus globulus; Myrtaceae) en el Distrito Metropolitano de Quito, Ecuador

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