Observed and modeled directional change in riparian forest composition at a cutbank edge

1993 ◽  
Vol 8 (3) ◽  
pp. 185-199 ◽  
Author(s):  
John A. Kupfer ◽  
George P. Malanson
Ecology ◽  
2009 ◽  
Vol 90 (1) ◽  
pp. 145-159 ◽  
Author(s):  
Matthew E. Baker ◽  
Michael J. Wiley

2020 ◽  
Vol 721 ◽  
pp. 137730 ◽  
Author(s):  
Philippe Janssen ◽  
John C. Stella ◽  
Hervé Piégay ◽  
Bianca Räpple ◽  
Bernard Pont ◽  
...  

2012 ◽  
Vol 57 (4) ◽  
pp. 759-772 ◽  
Author(s):  
JOHN S. KOMINOSKI ◽  
SANTIAGO LARRAÑAGA ◽  
JOHN S. RICHARDSON

Plant Ecology ◽  
2010 ◽  
Vol 210 (2) ◽  
pp. 317-330 ◽  
Author(s):  
Rachel L. Jolley ◽  
B. Graeme Lockaby ◽  
Guadalupe G. Cavalcanti

2008 ◽  
Vol 38 (5) ◽  
pp. 1159-1183 ◽  
Author(s):  
Mélanie Aubé

The goal of this investigation was to characterize the pre-European settlement forest composition of the Miramichi River watershed using witness trees to contribute to the definition of a baseline for assessing changes over time in the Acadian forest. The witness tree data were stratified by ecoregion and by ecosite, for the portions of the watershed that are in the Northern Uplands, Continental Lowlands, and Eastern Lowlands ecoregions of New Brunswick, as well as by riparian and inland forest; and pre-settlement forest composition (1787–1847) was compared with current forest composition (1998–2000). The witness tree data constitute evidence that a distinctive riparian forest existed before European settlement and that the difference between riparian and inland forest has lessened. They show that the proportions of Betula spp., Tsuga canadensis (L.) Carrière, Ulmus americana L., and Thuja occidentalis L. have decreased; that the proportion of Acer spp. has increased and that Picea spp. and Abies balsamea (L.) Mill. var. balsamea have maintained their overall dominance of the forest in number of individuals, and have increased it on at least 50% of the watershed area.


Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 330
Author(s):  
Markus Sallmannshofer ◽  
Debojyoti Chakraborty ◽  
Harald Vacik ◽  
Gábor Illés ◽  
Markus Löw ◽  
...  

The understanding of spatial distribution patterns of native riparian tree species in Europe lacks accurate species distribution models (SDMs), since riparian forest habitats have a limited spatial extent and are strongly related to the associated watercourses, which needs to be represented in the environmental predictors. However, SDMs are urgently needed for adapting forest management to climate change, as well as for conservation and restoration of riparian forest ecosystems. For such an operative use, standard large-scale bioclimatic models alone are too coarse and frequently exclude relevant predictors. In this study, we compare a bioclimatic continent-wide model and a regional model based on climate, soil, and river data for central to south-eastern Europe, targeting seven riparian foundation species—Alnus glutinosa, Fraxinus angustifolia, F. excelsior, Populus nigra, Quercus robur, Ulmus laevis, and U. minor. The results emphasize the high importance of precise occurrence data and environmental predictors. Soil predictors were more important than bioclimatic variables, and river variables were partly of the same importance. In both models, five of the seven species were found to decrease in terms of future occurrence probability within the study area, whereas the results for two species were ambiguous. Nevertheless, both models predicted a dangerous loss of occurrence probability for economically and ecologically important tree species, likely leading to significant effects on forest composition and structure, as well as on provided ecosystem services.


2012 ◽  
Vol 69 (10) ◽  
pp. 1663-1673 ◽  
Author(s):  
Liliana García ◽  
John S. Richardson ◽  
Isabel Pardo

Changes in riparian forest composition and diversity, such as plantations of exotic species, may alter resource quality, detritivore assemblages, and litter breakdown rates in streams. We hypothesized that different litter resources may influence colonization and drift of invertebrates inhabiting small, temperate rainforest streams in southwestern British Columbia, Canada. Leaves of different quality and origin were incubated in stream-side channels to test this hypothesis. The sequence of leaf decomposition rates was as follows: alder > alder + cedar > cedar ≥ eucalyptus. Cedar litter decayed faster when mixed with alder than when alone. Invertebrates colonizing leaf bags were predominantly collector–gatherers and shredders, particularly on alder leaves. Drift density varied over the incubation period and seemed to be controlled by leaf quality, since there were more individuals drifting from channels with alder leaves than from channels with cedar or eucalyptus. However, we observed different species-specific invertebrate responses controlled by leaf traits, particularly by numerically dominant chironomid species. Indeed, invertebrate drift from channels incubated with alder bags was mostly due to pupation and emergence of orthoclad midges, whereas this was not observed in the other channels. This differential response in colonization and drift has the potential to modify the transfer rates of organic matter to higher trophic levels and thus ecosystem functioning.


1990 ◽  
Vol 20 (7) ◽  
pp. 1036-1043 ◽  
Author(s):  
Carol A. Johnston ◽  
Robert J. Naiman

Beaver (Castorcanadensis) herbivory has both immediate and long-term effects on biomass, structure, and composition of riparian forests. Intense beaver foraging of trembling aspen (Populustremuloides Michx.) decreased tree density and basal area by as much as 43% within ~ 1-ha forage zones surrounding two beaver ponds in northern Minnesota. Maximum diameter of trees cut was 43.5 cm; average aspen stem diameter cut was 13.9 and 10.2 cm at the two ponds. Woody biomass harvested per beaver averaged 1.4 Mg•ha−1•year−1 over a 6-year foraging period. Most wood harvested was left on site or used in dam construction, rather than consumed. Selective foraging by beaver decreased the relative importance of preferred species (i.e., P. tremuloides) and increased the importance of avoided species (i.e., Alnusrugosa (Du Roi) Spreng., Piceaglauca (Moench) Voss), with long-term implications to forest succession and dynamics.


Ecology ◽  
2011 ◽  
Vol 92 (1) ◽  
pp. 151-159 ◽  
Author(s):  
John S. Kominoski ◽  
Laurie B. Marczak ◽  
John S. Richardson

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