Impacts of interacting fire, climate, and hydrologic changes on riparian forest ecosystems in the Southwest

2018 ◽  
pp. 32-46
Keyword(s):  
Forest Ecosystems ◽  
Riparian Forest

Nighttime doesn’t stop N2O and CH4 exchange from riparian forest tree stems with the atmosphere

2020 ◽  
Author(s):  
Thomas Schindler ◽  
Katerina Machacova ◽  
Ülo Mander ◽  
Kaido Soosaar
Keyword(s):  
Forest Ecosystems ◽  
Riparian Forest ◽  
Fast Response ◽  
Forest Tree ◽  
Soil Conditions ◽  
Ministry Of Education ◽  
Stem Height ◽  
Night Time ◽  
Sustainability Program ◽  
A Minor

<p>Riparian forest ecosystems have been considered to be a natural source of nitrous oxide (N<sub>2</sub>O) and a natural sink of methane (CH<sub>4</sub>), both of which are important greenhouse gases (GHG) originating from microbiological processes. Wetland trees may also contribute to the GHG exchange by the release of both gases to the atmosphere or uptake therefrom. Recent studies have investigated the role of tree stems, underlining their importance in understanding forest GHG dynamics, focussing on various tree species, soil conditions or seasonal dynamics. However, knowledge about the short-termed day and night-time distributed GHG exchange of tree stems with the atmosphere is still scarce. We studied stem fluxes in a riparian forest ecosystem aiming to investigate the diurnal pattern and predict the potential influence of solar radiation.</p><p>The diurnal flux measurements were performed at 40-year-old grey alder (Alnus incana) forest stand in Estonia with 12-hour interval during July-September 2017 and May-September 2018 (n=16). The exchange of N<sub>2</sub>O and CH<sub>4</sub> was measured from 12 trees at profile height up to 5 m (0.1, 0.8, 1.7, 2.5, 5.0 m) using non-steady state stem chamber systems and gas chromatography. Simultaneously, soil fluxes were automatically quantified using a dynamic chamber system (Picarro 2508); piezometers, automatic groundwater level wells, soil temperature and moisture sensors were installed to determine coherent soil conditions.</p><p>Our preliminary results showed N<sub>2</sub>O and CH<sub>4</sub> emissions from alder tree stems during daytime (4.91 ± 0.15 µg m<sup>-2</sup> h<sup>-1</sup> and 66.38 ± 16.02 µg m<sup>-2</sup> h<sup>-1</sup>, mean ± s.e.) and lower during nighttime (3.65 ± 0.22 µg m<sup>-2</sup> h<sup>-1</sup> and 51.49 ± 13.83 µg m<sup>-2</sup> h<sup>-1</sup>, mean ± s.e.) at 0.1 m stem height, revealing a likely link to solar-driven physiological tree activity. Further, with increasing stem height, the relation of night to daytime fluxes diminished. However, the day-wise variation, including a minor GHG uptake indicates a fast response to changing micro-spatial environmental conditions like water regime in the soil and temperature.</p><p>Our study demonstrates the GHG exchange between tree stems and atmosphere occurs both in day- and night-time, showing slightly higher values in day-time, probably due to the trees’ physiological activities. Furthermore, our findings provide the potential to predict reaction kinetics in future modelling of flux pathways in forest ecosystems.</p><p>Acknowledgement</p><p>This research was supported by the Ministry of Education and Science of Estonia (SF0180127s08 grant), the Estonian Research Council (IUT2-16, PRG-352, and MOBERC20), the Czech Science Foundation (17-18112Y), the Czech National Sustainability Program I (LO1415), and the EcolChange Centre of Excellence, Estonia.</p>

The Role of Abandoned Channels as Refugia for Sustaining Pioneer Riparian Forest Ecosystems

Ecosystems ◽  
2011 ◽  
Vol 14 (5) ◽  
pp. 776-790 ◽  
Author(s):  
John C. Stella ◽  
Maya K. Hayden ◽  
John J. Battles ◽  
Hervé Piégay ◽  
Simon Dufour ◽  
...  
Keyword(s):  
Forest Ecosystems ◽  
Riparian Forest ◽  
Abandoned Channels

Restoring degraded riparian forest ecosystems of the Western Ghats for ecological sustainability

2020 ◽  
Author(s):  
Mahesh Mohan ◽  
Vadakke Neelamana K. Saritha ◽  
Mutharimettak Rameshan ◽  
Ashly Chacko ◽  
Velamparambil G. Gopikrishna
Keyword(s):  
Western Ghats ◽  
Forest Ecosystems ◽  
Riparian Forest ◽  
Ecological Sustainability ◽  
The Western Ghats

scholarly journals ARBUSCULAR MYCORRHIZAL FUNGAL COMMUNITIES IN PASTURE AND TROPICAL RIPARIAN FOREST ECOSYSTEMS IN GUAJARÁ-MIRIM, RONDÔNIA, BRAZIL

FLORESTA ◽  
2021 ◽  
Vol 51 (3) ◽  
pp. 658
Author(s):  
Jéssica Archanjelo Jesus ◽  
Ana Lucy Caproni ◽  
Cristiane Figueira Silva ◽  
Marcos Gervasio Pereira ◽  
Otavio Augusto Queiroz Santos ◽  
...  
Keyword(s):  
Forest Ecosystems ◽  
Riparian Forest ◽  
Arbuscular Mycorrhizal ◽  
Fungal Communities ◽  
Arbuscular Mycorrhizal Fungal

THE USE AND EVALUATION OF RIPARIAN FOREST ECOSYSTEM SERVICES IN LATVIA

2015 ◽  
Author(s):  
Mārcis SAKLAURS
Keyword(s):  
Ecosystem Services ◽  
Forest Ecosystem ◽  
Forest Ecosystems ◽  
Riparian Forest ◽  
Research Work ◽  
Riparian Forests ◽  
Voluntary Work ◽  
Forest Ecosystem Services ◽  
Starting Point ◽  
Decision Making Processes

The use and evaluation of riparian forest ecosystem services is a topical issue in Latvia involving interests of different target groups. Research work on proper management methods, their impact on biological values and production function has been started in 2014, while information on social values was missing. Particular methodology was designed and three different approaches of opinion polls were used to obtain information on use of riparian forest services and their evaluation by public in spring, 2015. In total there were 1024 questionnaires distributed out of which 418 were analysed for the research purposes along with 224 filled on the Internet. Different services of riparian forest ecosystems were used by 88 % of respondents, mostly walking along rivers and swimming were mentioned. Respondents evaluated three different scenarios of forest management and 96% of them gave preference to the scenario which required implementation of sustainability criteria resulted in high diversity of species and an increase of esthetical values. Large part (61 %) of respondents accepted the idea of voluntary work to improve the condition of rivers and riparian forests and in average there were ready to work 3.8 days per year. Willingness to pay (WTP) to improve the situation of riparian forests and rivers close to a residence place of a respondents was expressed by 62 % of respondents, in the average 28.50 Euro per year was mentioned. The current research is a starting point for evaluation of riparian forest ecosystems and provides valuable information for further analyses. Research data are used to identify factors influencing the use and evaluation of different services provided by riparian forest ecosystem. Results will be used in decision making processes related to legislation and management changes, as well as in valuation of ecosystem services and planning of public use of riparian forests.

scholarly journals How Does the Engineering Species Affect Forest Ecosystems? Changes in Germination and Development Rate of Non-Forest Species Under the Nests of Ardea cinerea L.

2020 ◽  
Vol 39 (3) ◽  
pp. 250-259
Author(s):  
Wiktoria Hryń ◽  
Joanna Czarnecka ◽  
Ignacy Kitowski ◽  
Magdalena Franczak ◽  
Piotr Bartmiński
Keyword(s):  
Forest Ecosystems ◽  
Ecosystem Engineer ◽  
Riparian Forest ◽  
Soil Seed Bank ◽  
Mixed Forest ◽  
Pine Forest ◽  
Forest Species ◽  
Long Distance ◽  
Breeding Sites ◽  
Ardea Cinerea

AbstractAn ecosystem engineer is a species that indirectly changes the availability of resources for other organisms via physical modification of the habitat. A good example of such species is Ardea cinerea L. – a big waterbird that forms colonies up to a few hundreds of nests during the breeding season. The colonies modify the habitat in the close vicinity of the nests mainly through heavy input of organic matter (feces, dropped or regurgitated food leftovers, eggshells, dead birds, etc.), which in turn affects vegetation. In our previous study, we observed that the probability of occurrence of non-forest species under the nests was 29.5 times higher in control plots in two types of forest vegetation (oligotrophic pine forest and riparian mixed forest). Adaptation for long-distance dispersal turned out to be insignificant for the probability of species occurrence, which suggested that the diaspores of those species must have been present in the forest soil before the establishment of the grey heron colony. In the present study, we used the seedling emergence method to compare the structure of the soil seed bank in breeding sites and control plots in two forest ecosystems mentioned above. We also tested whether the increased amount of nitrates in soil had a positive effect on the rate of germination and growth of seedlings. The results have shown that some reservoir of ruderal species was indeed present in the control plots, although their amount was higher under the heronries. We have proved that the number of germinating seeds of ruderal species depends on the concentration of nitrate in the soil of the pine forest. Comparison of the dry weight of 30- and 60-day-old seedlings of Rumex acetosella (pine forest) and Betula pendula (riparian forest) from the control and breeding sites showed an increased size of seedlings coming from the breeding sites of both forest communities.

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