Seasonal variation of soluble carbohydrates and starch in Echinolaena inflexa, a native grass species from the Brazilian savanna, and in the invasive grass Melinis minutiflora

Echinolaena inflexa (Poir.) Chase is an abundant C3 grass species with high biomass production in the Brazilian savanna (cerrado); Melinis minutiflora Beauv. is an African C4 forage grass widespread in cerrado and probably displacing some native herbaceous species. In the present work, we analysed seasonally the content and composition of soluble carbohydrates, the starch amounts and the above-ground biomass (phytomass) of E. inflexa and M. minutiflora plants harvested in two transects at 5 and 130 m from the border in a restrict area of cerrado at the Biological Reserve and Experimental Station of Mogi-Guaçu (SP, Brazil). Results showed that water soluble carbohydrates and starch amounts from the shoots of both species varied according to the time of the year, whilst in the underground organs, variations were observed mainly in relation to the transects. Marked differences in the pattern of the above-ground biomass production between these two grasses relative to their location in the Reserve were also observed, with two peaks of the invasive species (July and January) at the Reserve border. The differences in carbohydrate accumulation, partitioning and composition of individual sugars concerning time of the year and location in the Reserve were more related to the annual growth cycle of both grasses and possibly to specific physiological responses of M. minutiflora to disturbed environments in the Reserve border.

Download Full-text

Phylogenetic diversity correlated with above‐ground biomass production during forest succession: Evidence from tropical forests in Southeast Asia

Journal of Ecology ◽

10.1111/1365-2745.13112 ◽

2018 ◽

Vol 107 (3) ◽

pp. 1419-1432 ◽

Cited By ~ 6

Author(s):

Manichanh Satdichanh ◽

Huaixia Ma ◽

Kai Yan ◽

Gbadamassi G.O. Dossa ◽

Leigh Winowiecki ◽

...

Keyword(s):

Southeast Asia ◽

Tropical Forests ◽

Biomass Production ◽

Phylogenetic Diversity ◽

Forest Succession ◽

Above Ground Biomass ◽

Ground Biomass

Download Full-text

Linking above-ground biomass production to below-ground carbon fluxes across stocking, clone, fertilization, and understory elimination in Pinus radiata D.Don plantations, New Zealand

Forest Ecology and Management ◽

10.1016/j.foreco.2020.118469 ◽

2020 ◽

Vol 477 ◽

pp. 118469

Author(s):

Mohan KC ◽

Euan G. Mason ◽

Horacio E. Bown

Keyword(s):

New Zealand ◽

Biomass Production ◽

Pinus Radiata ◽

Carbon Fluxes ◽

Above Ground Biomass ◽

Ground Biomass ◽

Below Ground

Download Full-text

The effect of small gaps in California annual grassland on above-ground biomass production

Grass and Forage Science ◽

10.1046/j.1365-2494.2001.00280.x ◽

2001 ◽

Vol 56 (4) ◽

pp. 323-329 ◽

Cited By ~ 2

Author(s):

J. S. Fehmi ◽

E. A. Laca ◽

K. J. Rice

Keyword(s):

Biomass Production ◽

Above Ground Biomass ◽

Ground Biomass ◽

Annual Grassland ◽

California Annual Grassland

Download Full-text

Potential above ground biomass production and total tree carbon sequestration in the major forest species in NW Spain

International Forestry Review ◽

10.1505/146554813807700083 ◽

2013 ◽

Vol 15 (3) ◽

pp. 273-289 ◽

Cited By ~ 4

Author(s):

J. Castaño-Santamaría ◽

M. Barrio-Anta ◽

P. Álvarez-Álvarez

Keyword(s):

Carbon Sequestration ◽

Biomass Production ◽

Above Ground Biomass ◽

Forest Species ◽

Nw Spain ◽

Ground Biomass ◽

Total Tree

Download Full-text

Assessing Functional Diversity-Productivity Relationships in Temperate Forests in Northern Mexico

10.21203/rs.3.rs-42734/v1 ◽

2020 ◽

Author(s):

Benedicto Vargas-Larreta ◽

Jorge O. López-Martínez ◽

Jose Javier Corral-Rivas ◽

Francisco Javier Hernández

Keyword(s):

Species Richness ◽

Functional Diversity ◽

Biomass Production ◽

Temperate Forests ◽

Taxonomic Diversity ◽

Mass Ratio ◽

Above Ground Biomass ◽

Northern Mexico ◽

Ground Biomass ◽

Diversity Metrics

Abstract Background: Studies on the relationships between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem processes. There is no general pattern regarding the relationship found in various studies, and positive, unimodal, negative, and neutral relationships keep the issue controversial. In this study, taxonomic diversity vs functional diversity as drivers of above-ground biomass were compared, and the mechanisms that influence biomass production were investigated by testing the complementarity and the mass-ratio hypoteses.Methods: Using data from 414 permanent sampling plots, covering 23% of temperate forests in the Sierra Madre Occiental (Mexico), we estimated the above-ground biomass (AGB) for trees ≥7.5 cm d.b.h. in managed and unmanaged stands. We evaluated AGB-diversity relationships (species richness, Shannon-Wiener and Simpson indices), AGB-weighted mean community values (CWM) of tree species functional traits (maximum height, leaf size, and wood density) and five measures of functional diversity (functional dispersion, functional richness, functional uniformity, functional diversity, and RaoQ index).Results: We reveal a consistent hump-shaped relationship between aboveground biomass and species richness in managen and unmanaged forest. CWM_Hmax was the most important predictor of AGB in both managed and unmanaged stands, which suggests that the mechanism that explains the above-ground biomass in these ecosystems is dominated by certain highly productive species in accordance of the mass-ratio hypothesis. There were no significant relationships between taxonomic diversity metrics (Shannon-Wiener and Simpson indices) or measures of functional diversity with AGB. The results support the mass-ratio hypothesis to explain the AGB variations.Conclusions: We concluded that diversity does not influence biomass production in the temperate mixed-species and uneven-aged forests of northern Mexico. These forests showed the classic hump-shaped productivity-species richness relationship, with biomass accumulation increasing at low to intermediate levels of species plant diversity and decreasing at high species richness. Functional diversity explains better forest productivity than classical diversity metrics.

Download Full-text

Biomass production of grey alder, hybrid alder and silver birch stands on abandoned agricultural land

Forestry Studies / Metsanduslikud Uurimused ◽

10.2478/v10132-011-0055-0 ◽

2008 ◽

Vol 48 (1) ◽

pp. 53-66 ◽

Cited By ~ 4

Author(s):

Jürgen Aosaar ◽

Veiko Uri

Keyword(s):

Biomass Production ◽

Tree Species ◽

Agricultural Land ◽

Rotation Period ◽

Production Capacity ◽

Silver Birch ◽

Above Ground Biomass ◽

Ground Biomass ◽

Short Rotation ◽

The Mean

Halli lepa, hübriidlepa ja arukase biomassi produktsioon endistel põllumaadel The present study is based on four experimental sites, located in Southern-Estonia: hybrid alder and grey alder plantations located in Põlva county, and two sample plots of silver birch, located in Tartu county. The stand characteristics, above-ground biomass and current annual production (CAP) were estimated in order to evaluate production capacity of different tree species growing on abandoned agricultural lands. Due to fast growth and high biomass production capacity the most promising tree species for short-rotation forestry in Estonia is grey alder. The stem mass in the 13-years-old grey alder and hybrid alder stand was 63.4 t ha-1 and 40.0 t ha-1, respectively. However, the different biomass production is mainly affected by stand densities, 6170 trees per ha and 4080 trees per ha, respectively. During ageing, the differences between the alder stands diminish. At the age of 14, mean height and diameter at breast height were practically equal. Also the mean stem mass in the older, 13-year old stand, is almost equal: 10.3 kg in grey alder stand and 9.8 kg in hybrid alder stand. At a younger age, the mean stem mass was higher in grey alder stand, but later, at the age of 13, the mean stem mass has become almost the same (10.3 kg in grey alder stand and 9.8 kg in hybrid alder stand). The rotation period for hybrid alder is longer than for grey alder and bulk maturity will occur later. Silver birch is also a highly productive tree species and has a prospect for short-rotation forestry. The mean stem mass and annual current increment of 8-year-old silver birch stand was in same the magnitude as in the grey alder stand. Although the average stand diameter and height were lower in the silver birch stand than in the grey alder stand, it is compensated by the higher wood density of birch wood. The number of trees has affected silver birch stand production, the above-ground biomass in the very high density birch stand (35 600 trees per ha) was significantly lower than in the sparse stand (11 600 trees per ha), 22.8 t ha-1 and 31.2 t ha-1, respectively.

Download Full-text

Evaluation of drought and UV radiation impacts on above-ground biomass of mountain grassland by spectral reflectance and thermal imaging techniques

Beskydy ◽

10.11118/beskyd201609010021 ◽

2016 ◽

Vol 9 (1-2) ◽

pp. 21-30 ◽

Cited By ~ 1

Author(s):

Kateřina Novotná ◽

Karel Klem ◽

Petr Holub ◽

Barbora Rapantová ◽

Otmar Urban

Keyword(s):

Drought Stress ◽

Uv Radiation ◽

Biomass Production ◽

Thermal Imaging ◽

Spectral Reflectance ◽

Canopy Temperature ◽

Stress Factors ◽

Above Ground Biomass ◽

Ground Biomass ◽

Mountain Grassland

Drought represents one of the major factors limiting productivity of managed and natural ecosystems. Under natural field conditions drought is often associated with other stress factors such as high temperature and UV radiation, which may result in enhancement or vice versa alleviation of drought impact. Remote sensing methods have a large potential to evaluate impacts of drought on plant production at regional scale. The main objective of this study was to analyse the potential of ground-based measurement of spectral reflectance and thermal imaging for monitoring the impacts of drought and UV radiation on above-ground biomass production of mountain grassland ecosystem. Experimental rain-out shelters were used to manipulate incident precipitation and UV radiation for 7 weeks (May–July). A canopy spectral reflectance, thermal images, and total above-ground biomass were determined at the end of drought and UV treatment. Results show that drought led to a significant reduction of above-ground biomass, particularly under ambient UV radiation. In contrary, UV had only negligible effect on biomass production. Canopy temperature as well as selected spectral reflectance indices showed significant response to drought stress and also significant relationships to above-ground biomass. However, the relationship between canopy temperature and above-ground biomass is modified by UV radiation. Best prediction of changes in biomass caused by drought stress was provided by vegetation index NDVI.

Download Full-text