STEMFLOW NUTRIENT INPUT IN TREES IN A TROPICAL FOREST IN PERNAMBUCO, BRAZIL

Rainfall is the main source of water in forest ecosystems and stemflow is an important pathway for nutrients to enter these ecosystems. Thus, this study aimed to evaluate effective precipitation in a fragment of tropical forest and stemflow nutrient input of tree species in different periods of rainfall. Total precipitation and throughfall were measured using rain gauges inside and at the edge of the fragment. After a phytosociological survey, nine species with the highest absolute density in the fragment were chosen and three individuals were selected. Water collectors were fixed around their trunk to collect stemflow water. The stemflow water was measured in milliliters, and pH, electrical conductivity and the input of K, P and Na were determined. Based on the throughfall and stemflow, the effective precipitation was calculated. The stemflow nutrient input presented the following decreasing order: Na>K>P. The high input of Na can be explained by the fact that the fragment is close to the coastal area. Stemflow of forest species proved to be an important pathway for nutrients to enter forest ecosystems, effectively participating in nutrient cycling.

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Frugivore zoogeochemistry in tropical forest ecosystems

Functional Ecology ◽

10.1111/1365-2435.13741 ◽

2021 ◽

Vol 35 (2) ◽

pp. 304-305

Author(s):

Shawn J. Leroux

Keyword(s):

Tropical Forest ◽

Forest Ecosystems

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Climate change impact on the initial development of tropical forest species: a multi-model assessment

Theoretical and Applied Climatology ◽

10.1007/s00704-021-03646-5 ◽

2021 ◽

Author(s):

Fernando Yuri da Silva Reis ◽

Fabrina Bolzan Martins ◽

Roger Rodrigues Torres ◽

Gabriel Wilson Lorena Florêncio ◽

Jefferson Martiniano Cassemiro ◽

...

Keyword(s):

Climate Change ◽

Tropical Forest ◽

Climate Change Impact ◽

Model Assessment ◽

Forest Species ◽

Initial Development ◽

Change Impact

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Impacts of tropical cyclones on hydrochemistry of a subtropical forest

Hydrology and Earth System Sciences ◽

10.5194/hess-17-3815-2013 ◽

2013 ◽

Vol 17 (10) ◽

pp. 3815-3826 ◽

Cited By ~ 12

Author(s):

C. T. Chang ◽

S. P. Hamburg ◽

J. L. Hwong ◽

N. H. Lin ◽

M. L. Hsueh ◽

...

Keyword(s):

Tropical Cyclones ◽

Forest Ecosystems ◽

Subtropical Forest ◽

Annual Rainfall ◽

Limited Data ◽

Nutrient Input ◽

Weather Forecasts ◽

Streamwater Chemistry ◽

Stochastic Nature ◽

Order Of Magnitude

Abstract. Tropical cyclones (typhoons/hurricanes) have major impacts on the biogeochemistry of forest ecosystems, but the stochastic nature and the long intervals between storms means that there are limited data on their effects. We characterised the impacts of 14 typhoons over six years on hydrochemistry of a subtropical forest plantation in Taiwan, a region experiencing frequent typhoons. Typhoons contributed 1/3 of the annual rainfall on average, but ranged from 4 to 55%. The stochastic nature of annual typhoon related precipitation poses a challenge with respect to managing the impacts of these extreme events. This challenge is exacerbated by the fact that typhoon-related rainfall is not significantly correlated with wind velocity, the current focus of weather forecasts. Thus, little advance warning is provided for the hydrological impacts of these storms. The typhoons we studied contributed approximately one third of the annual input and output of most nutrients (except nitrogen) during an average 9.5 day yr−1 period, resulting in nutrient input/output rates an order of magnitude greater than during non-typhoon months. Nitrate output balanced input during the non-typhoon period, but during the typhoon period an average of 10 kg ha−1 yr−1 nitrate was lost. Streamwater chemistry exhibited similarly high variability during typhoon and non-typhoon periods and returned to pre-typhoon levels one to three weeks following each typhoon. The streamwater chemistry appears to be very resilient in response to typhoons, resulting in minimal loss of nutrients.

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Effect of the Gabčíkovo Waterworks (Slovakia) on riparian floodplain forest ecosystems in the Danube inland delta: vegetation dynamics and trends

Biologia ◽

10.1515/biolog-2017-0082 ◽

2017 ◽

Vol 72 (7) ◽

Cited By ~ 2

Author(s):

Mária Petrášová-Šibíková ◽

Igor Matečný ◽

Eva Uherčíková ◽

Peter Pišút ◽

Silvia Kubalová ◽

...

Keyword(s):

Species Composition ◽

Forest Ecosystems ◽

Supply System ◽

Floodplain Forest ◽

Soil Conditions ◽

Plant Species Composition ◽

Forest Species ◽

The Past ◽

The Impact ◽

Rare Opportunity

AbstractHuman alteration of watercourses is global phenomenon that has had significant impacts on local ecosystems and the services they provide. Monitoring of abiotic and biotic changes is essential to mitigating long-lasting effects, and the 23-year dataset from the Gabčíkovo Waterworks provided a rare opportunity to assess the impact of groundwater regimes on vegetation. The main aim of this study was to describe the effect of the Gabčíkovo Waterworks on vegetation structure and species composition of the adjacent riparian floodplain forests over the past 23 years. The results are based on studies of three permanent monitoring plots (PMPs) located in the Danube inland delta – two outside (PMP 1 and 3) and one (PMP 2) fully under the influence of the artificial supply system. Our results demonstrate that the Danube inland delta was negatively affected by the Gabčíkovo construction, particularly for sites outside of the artificial supply system. There was a significant decrease in soil moisture and increase in nitrogen at both external PMPs (1 and 3). Alter soil conditions were accompanied by negative changes in plant species composition demonstrated by decreases in the number of typical floodplain forest species that are characteristic for the alliance

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Quantification Of Leaf Emissivities Of Forest Species: Effects On Modelled Energy And Matter Fluxes In Forest Ecosystems

GEOGRAPHY ENVIRONMENT SUSTAINABILITY ◽

10.24057/2071-9388-2018-86 ◽

2019 ◽

Vol 12 (2) ◽

pp. 245-258

Author(s):

Nina Tiralla ◽

Oleg Panferov ◽

Heinrich Kreilein ◽

Alexander Olchev ◽

Ashehad A. Ali ◽

...

Keyword(s):

Forest Ecosystems ◽

Forest Species ◽

Species Effects

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Occurrence of Scolytinae in mangrove with impact trap and in wood of five forest species

Bioscience Journal ◽

10.14393/bj-v36n1a2020-47920 ◽

2020 ◽

Vol 36 (1) ◽

Author(s):

Charles Oliveira da Silva ◽

Henrique Trevisan ◽

Thiago Sampaio de Souza ◽

Acacio Geraldo de Carvalho

Keyword(s):

Forest Ecosystems ◽

Melia Azedarach ◽

Insect Infestation ◽

Forest Species ◽

Wood Degradation ◽

Eucalyptus Pellita ◽

Baited Traps ◽

Mangrove Environment ◽

Set Up ◽

Corymbia Citriodora

Scolytinae is a beetle group belonging to Order Coleoptera; these insects play an essential role in wood degradation in forest ecosystems, since they build galleries that enable substrate colonization by other saprophytic organisms, as well as nutrient cycling. Thus, the aim of the current study was to evaluate the occurrence of Scolytinae in the wood of 5 tree species exposed to mangrove environment, as well as to simultaneously survey Scolytinae specimens captured in ethanol-baited impact traps placed in the same environment. The study was carried out in a mangrove area located in Santa Cruz neighborhood - RJ. Five freshly-harvested Clitoria fairchildiana, Rhyzophora mangle, Corymbia citriodora, Melia azedarach and Eucalyptus pellita wood logs (1 m long and 5-10 cm diameter) were arranged perpendicular to the ground (1 m above it) and spaced 30 cm away from each other. Five impact traps were set up 50 m away from each other, 1.3 m above the ground. Insects were collected for 5 months. One hundred and thirty (130) Scolytinae individuals (14 species in 2 genera) were recorded in the wood logs; the relative frequency (Fr) of the species comprised Xyleborus affinis (33.9%) and Hypothenemus sp.4 (17.7%), which represented 51.6% of the total number of captured individuals. Hypothenemus sp.6 specimens were not collected in ethanol-baited traps, but the wood of C. fairchildiana. E. pellita did not show insect infestation. The traps captured 798 individuals (24 species belonging to 8 genera); the frequency of X. affinis (25.3%) and Hypothenemus eruditus (14.5%) represented 39.8% of the total number of captured insects.

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