Subsidy or stress? Tree structure and growth in wetland forests along a hydrological gradient in Southern Europe

Rodríguez‐González, Patricia María; Stella, John C.; Campelo, Filipe; Ferreira, Maria Teresa; Albuquerque, António

doi:10.1016/j.foreco.2010.02.012

Cited by 87 publications

(77 citation statements)

References 82 publications

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“…Nevertheless, several dendroclimatic studies have shown a relatively weak relationship between the annual radial growth of trees and climate in wetlands (Linderholm, 1999;Linderholm & Leine, 2004). The black alder growth may therefore be significantly affected by local environmental factors (Rodríguez-González et al, 2010), which may react variously to key climate variables in time. In our case, this is particularly evident in the Orlické hory Mts., where no dependence of radial increment on the mean monthly temperature was confirmed.…”

Section: Discussionmentioning

confidence: 99%

Structural diversity and production of alder stands on former agricultural land at high altitudes

Vacek¹,

Vacek²,

Podrázský³

et al. 2016

Dendrobiology

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Abstract:The paper deals with the structural diversity and production of a less frequently studied type of alder stands originated on former agricultural lands in the 1950s, established partly by plantation and partly by natural succession in the area of the Krkonoše Mts. and the Orlické hory Mts. (Czech Republic). Four permanent research plots (PRP) were established at sites where Black alder (Alnus glutinosa L. Gaertn.) and Grey alder (Alnus incana L. Moench.) naturally occurs, each plot of 0.25 ha in size. The aim of the study was to evaluate the structure and development of the alder stands with respect to biodiversity, horizontal, vertical and species structure, diameter increment with emphasis on climate factors, and the quantity and quality of timber production. The results document low diversification of the studied stands in the PRPs. The horizontal structure is defined as random and clumped at sites at the highest altitude with high water table. The number of living trees with DBH ≥ 4 cm ranges between 556 to 828 trees ha -1 with the relative stand density index (SDI) 0.67-0.77. The stand volume ranges from 247 to 393 m 3 ha -1, and decreases with higher altitudes. Low temperatures is limiting factor for radial growth in the high mountain areas, respectively low precipitation in the middle lands. Owing to a rather specific site character, as especially the spring area, the stands exhibit only average production, but the production quality is generally high. The quality timber is suitable for industrial use; the rot-affected trunk base parts usable for fuel represent only approximately 16%.

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Section: Discussionmentioning

confidence: 99%

Structural diversity and production of alder stands on former agricultural land at high altitudes

Vacek¹,

Vacek²,

Podrázský³

et al. 2016

Dendrobiology

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“…First, it is likely that these soils have more than 95% of their N tied up as organic nitrogen (ON), and less than 5% available IN, because soils of subarctic forests have shown slower decomposition of SOM and lower mineralization of N due to low temperatures [50,51]. Nutrient mineralization can be further retarded by the high saturation of these soils [52]. Secondly, the N-fertilizer values were reported as a mass (kg/ha) and converted to a volume (ppm), while, the measured N values were initially reported as a mass (% dry) and converted volume (ppm).…”

Section: Soil Fertility (N P K Mg Ph)mentioning

confidence: 99%

The Potential Use of Agroforestry Community Gardens as a Sustainable Import-Substitution Strategy for Enhancing Food Security in Subarctic Ontario, Canada

2013

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Abstract:The high prevalence of food insecurity experienced by northern First Nations partially results from dependence on an expensive import-based food system that typically lacks nutritional quality and further displaces traditional food systems. In the present study, the feasibility of import substitution by Agroforestry Community Gardens (AFCGs) as socio-ecologically and culturally sustainable means of enhancing food security was explored through a case study of Fort Albany First Nation in subarctic Ontario, Canada. Agroforestry is a diverse tree-crop agricultural system that has enhanced food security in the tropics and subtropics. Study sites were selected for long-term agroforestry research to compare Salix spp. (willow)-dominated AFCG plots to a -no tree‖ control plot in Fort Albany. Initial soil and vegetative analysis revealed a high capacity for all sites to support mixed produce with noted modifications, as well as potential competitive and beneficial willow-crop interactions. It is anticipated that inclusion of willow trees will enhance the long-term productive capacity of the AFCG test plots. As an adaptable and dynamic system, AFCGs have potential to act as a more reliable local agrarian system and a refuge for culturally significant plants in high-latitude First Nation socio-ecological systems, which are particularly vulnerable to rapid cultural, climatic, and ecological change.

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“…In wetlands, water can be both a limiting resource and a chronic stressor (Mitsch and Gosselink, 2007). Hydrology is a dominant driver of stand composition structure and growth, as well as tree architecture in wetland forests (Rodríguez-González et al, 2010). Effects of changes in hydrology regime vary among forest vegetation types, between young and mature stands and tree species (Becker et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Growth responses of sessile oak to climate and hydrological regime in the Zbytka Nature Reserve, Czech Republic

Čejková

Poláková

2012

Geochronometria

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Abstract:Complex of Nature reservation Zbytka is the rest of various fen vegetation in the northeast part of the Czech Republic. It represents an important spring area which provides high quality potable water for more than 150 000 inhabitants. Waterworks utilization was started in the 1960s and the change of land-use practices has had a strong effect on the ecosystem. Oak chronology has been showing different tree growth trends since the start of the waterworks utilization. Also the occurrences of negative pointer years differ markedly before and after initiation of pumping underground water. Dendroclimatological analyses primarily revealed a close relationship between the temperature and tree growth -positive influence of spring and summer temperature. The period 1983-1992 of maximum artesian water pumping is expressed as higher tree-ring increments, but linear model analyses showed that the growth reaction of oak is not due to simple causality between temperature and underground water level. The radial increments reacted positively to the combination of high temperature during the vegetation season and low or, the contrary, high depth of underground water level. No direct relationship was detected between tree growth and fluctuation of underground water level; despite of the results dendrochronological data may be useful in historical ground water modelling studies. Results are also crucial for conflict of interests between nature preservation and potable water supply.

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Subsidy or stress? Tree structure and growth in wetland forests along a hydrological gradient in Southern Europe

Cited by 87 publications

References 82 publications

Structural diversity and production of alder stands on former agricultural land at high altitudes

Structural diversity and production of alder stands on former agricultural land at high altitudes

The Potential Use of Agroforestry Community Gardens as a Sustainable Import-Substitution Strategy for Enhancing Food Security in Subarctic Ontario, Canada

Growth responses of sessile oak to climate and hydrological regime in the Zbytka Nature Reserve, Czech Republic

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