Spatial distribution of halophytes in the Mondego salt marsh and plant responses to environmental conditions

High concentrations of ozone (O3) can have significant impacts on the health and productivity of agricultural and forest ecosystems, leading to significant economic losses. In order to estimate this impact under a wide range of environmental conditions, the mechanisms of O3 impacts on physiological and biochemical processes have been intensively investigated. This includes the impact on stomatal conductance, the formation of reactive oxygen species and their effects on enzymes and membranes, as well as several induced and constitutive defence responses. This review summarises these processes, discusses their importance for O3 damage scenarios and assesses to which degree this knowledge is currently used in ecosystem models which are applied for impact analyses. We found that even in highly sophisticated models, feedbacks affecting regulation, detoxification capacity and vulnerability are generally not considered. This implies that O3 inflicted alterations in carbon and water balances cannot be sufficiently well described to cover immediate plant responses under changing environmental conditions. Therefore, we suggest conceptual models that link the depicted feedbacks to available process-based descriptions of stomatal conductance, photosynthesis and isoprenoid formation, particularly the linkage to isoprenoid models opens up new options for describing biosphere-atmosphere interactions.

Download Full-text

Spatial distribution of spruce trees in the nature reserve 'Jankove bare' on mt. Kopaonik

Glasnik Sumarskog fakulteta ◽

10.2298/gsf0900191s ◽

2009 ◽

pp. 191-204

Author(s):

Branko Stajic ◽

Milivoj Vuckovic ◽

Marko Smiljanic

Keyword(s):

Spatial Distribution ◽

Tree Growth ◽

Environmental Conditions ◽

National Park ◽

Nature Reserve ◽

Distance Methods ◽

Study Results

The methodology and applicability of the study of spatial distribution of trees in Serbian forestry have been insufficiently reported and presented. This paper, based on mathematical?statistical principles, analyses the method of spatial distribution of spruce trees in the Nature Reserve 'Jankove Bare' in the National Park 'Kopaonik'. The following methods in the group of distance methods were applied: Kotar's method (1993), T2?method, and the index of distance dispersion (Johnson, Zimmer, 1985). The study results in a pure uneven-aged spruce stand based on all three methods showed that spruce trees are randomly distributed over the stand area. Therefore, environmental conditions in the study stand can be regarded as homogeneous and equally suitable for tree growth, and there are no significant interactions between the trees, which could cause a higher competition between the trees for nutrients, water, etc.

Download Full-text

Developing Automated Spectral Analysis Tools for Interstellar Features Extractionto Support Construction of the 3D ISM Map

Proceedings of the International Astronomical Union ◽

10.1017/s1743921317005981 ◽

2017 ◽

Vol 12 (S330) ◽

pp. 243-244

Author(s):

L. Puspitarini ◽

R. Lallement ◽

A. Monreal-Ibero ◽

H.-C. Chen ◽

H. L. Malasan ◽

...

Keyword(s):

Spectral Analysis ◽

Spatial Distribution ◽

Spatial Resolution ◽

Environmental Conditions ◽

Equivalent Width ◽

Global Analysis ◽

Line Of Sight ◽

Absorption Data ◽

Diffuse Interstellar Bands ◽

Automated Spectral Analysis

AbstractOne of the ways to obtain a detailed 3D ISM map is by gathering interstellar (IS) absorption data toward widely distributed background target stars at known distances (line-of-sight/LOS data). The radial and angular evolution of the LOS measurements allow the inference of the ISM spatial distribution. For a better spatial resolution, one needs a large number of the LOS data. It requires building fast tools to measure IS absorption. One of the tools is a global analysis that fit two different diffuse interstellar bands (DIBs) simultaneously. We derived the equivalent width (EW) ratio of the two DIBs recorded in each spectrum of target stars. The ratio variability can be used to study IS environmental conditions or to detect DIB family.

Download Full-text

Spatial distribution of dengue incidence and socio-environmental conditions in Campinas, São Paulo State, Brazil, 2007

Cadernos de Saúde Pública ◽

10.1590/s0102-311x2013001200005 ◽

2013 ◽

Vol 29 (8) ◽

pp. 1522-1532 ◽

Cited By ~ 16

Author(s):

José Vilton Costa ◽

Maria Rita Donalisio ◽

Liciana Vaz de Arruda Silveira

Keyword(s):

Spatial Distribution ◽

Environmental Conditions ◽

Sao Paulo ◽

São Paulo ◽

Paulo State ◽

São Paulo State

Download Full-text

Growth dynamics of the branching system in grasses: an architecture-based methodology for quantitative evaluation applied to two genotypes of Paspalum vaginatum

Rodriguésia ◽

10.1590/2175-7860201970081 ◽

2019 ◽

Vol 70 ◽

Author(s):

Liliana Teresa Fabbri ◽

Pedro Insausti ◽

William B. Batista ◽

Gabriel H. Rua

Keyword(s):

Spatial Distribution ◽

Production Rate ◽

Environmental Conditions ◽

Reproductive Effort ◽

Growth Dynamics ◽

Vegetative Cover ◽

Branching Order ◽

Aerial Growth ◽

Paspalum Vaginatum ◽

Branching System

Abstract The aerial growth dynamics of the shoots of the widespread turfgrass Paspalum vaginatum was studied. With the aim of identifying quantitative differential features between two genotypes, plants were cultivated outdoors in pots during two consecutive summers. Axes of different branching order were marked for periodical observation to quantify internode production rate, axis production rate, covering rate and reproductive effort. The genotypes differed significantly in the following quantitative features: plagiotropic vs. orthotropic axes proportion, internode production rate, flowering vs. vegetative tiller ratio, vegetative cover and spatial distribution of the canopy. Knowledge of these features may help to understand the great plasticity and adaptability of this species to multiple environmental conditions.

Download Full-text