U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Subject allometry Remove constraint Subject: allometry Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
Start Over

Search

3,706  Search Results

« Previous | 1 - 20 of 3,706 |
Number of results to display per page

Search Results

1. A Morphometric Assessment of the Condition of White Croakers (Genyonemus Lineatus) and Queenfish (Seriphus Politus) with Access to a Wastewater Outfall and a DDT/Polychlorinated Biphenyl Superfund Site: A Los Angeles Outer Harbor Case Study

Author:
Ochan Otim
Source:
Environmental toxicology and chemistry 2022 v.41 no.2 pp. 410-425
ISSN:
0730-7268
Subject:
Genyonemus; allometry; bioaccumulation; body weight; case studies; chemistry; ecotoxicology; equations; females; fish; males; marine ecosystems; morphometry; polychlorinated biphenyls; rivers; stormwater; wastewater
Abstract:
... Sediments and water columns in the Los Angeles Outer Harbor (CA, USA), a major port behind a breakwater, contain DDTs and polychlorinated biphenyls (PCBs) from a nearby Superfund site, and contaminants brought in by ships, boats, stormwater, a river, and a wastewater outfall. White croaker and queenfish, a bottom feeder and a water column feeder, respectively, are two bioindicators for this marine ...
DOI:
10.1002/etc.5262

2. A comprehensive framework for assessing the accuracy and uncertainty of global above-ground biomass maps

Author:
Arnan Araza; Sytze de Bruin; Martin Herold; Shaun Quegan; Nicolas Labriere; Pedro Rodriguez-Veiga; Valerio Avitabile; Maurizio Santoro; Edward T.A. Mitchard; Casey M. Ryan; Oliver L. Phillips; Simon Willcock; Hans Verbeeck; Joao Carreiras; Lars Hein; Mart-Jan Schelhaas; Ana Maria Pacheco-Pascagaza; Polyanna da Conceição Bispo; Gaia Vaglio Laurin; Ghislain Vieilledent; Ferry Slik; Arief Wijaya; Simon L. Lewis; Alexandra Morel; Jingjing Liang; Hansrajie Sukhdeo; Dmitry Schepaschenko; Jura Cavlovic; Hammad Gilani; Richard Lucas
Source:
Remote sensing of environment 2022 v.272 pp. 112917
ISSN:
0034-4257
Subject:
aboveground biomass; algorithms; allometry; carbon; carbon cycle; climate; environment; forests; models; national forests; satellites; standard deviation; uncertainty; variance
Abstract:
... Over the past decade, several global maps of above-ground biomass (AGB) have been produced, but they exhibit significant differences that reduce their value for climate and carbon cycle modelling, and also for national estimates of forest carbon stocks and their changes. The number of such maps is anticipated to increase because of new satellite missions dedicated to measuring AGB. Objective and c ...
DOI:
10.1016/j.rse.2022.112917

3. A model of coppice biomass recovery for mallee-form eucalypts

Author:
Kim Brooksbank; Adrian Goodwin
Source:
New forests 2022 v.53 no.3 pp. 449-468
ISSN:
0169-4286
Subject:
Eucalyptus polybractea; allometry; biomass; carbon sequestration; coppicing; environmental degradation; growth models; income; planting; rain
Abstract:
... Planting mallee-form eucalypts amongst crops has the potential to remedy environmental degradation caused by land clearing in low rainfall regions, whilst also providing income through carbon-sequestration or periodic coppicing. Management options can be supported by models of biomass and coppice recovery, and this paper presents the first empirical coppice growth model for mallee eucalypts. Uncop ...
DOI:
10.1007/s11056-021-09863-0

4. A new protocol for estimation of woody aboveground biomass in disturbance-prone ecosystems

Author:
Liana Kindermann; Magnus Dobler; Daniela Niedeggen; Anja Linstädter
Source:
Ecological indicators 2022 v.135 pp. 108466
ISSN:
1470-160X
Subject:
aboveground biomass; allometry; arid lands; forest inventory; forests; herbivores; savannas; wildfires
Abstract:
... Almost one third of global drylands are open forests and savannas, which are typically shaped by frequent natural disturbances such as wildfire and herbivory. Studies on ecosystem functions and services of woody vegetation require robust estimates of aboveground biomass (AGB). However, most methods have been developed for comparatively undisturbed forest ecosystems. As they are not tailored to acc ...
DOI:
10.1016/j.ecolind.2021.108466

5. ACGCA: An R package for simulating tree growth and mortality based on functional traits

Author:
Michael Fell; Jarrett Barber; Kiona Ogle
Source:
Ecological informatics 2022 v.69 pp. 101605
ISSN:
1574-9541
Subject:
algorithms; allometry; canopy gaps; carbon; light intensity; models; mortality; photosynthesis; tree growth; trees
Abstract:
... The Allometrically Constrained Growth and Carbon Allocation (ACGCA) model is an individual-based model of tree growth and mortality, and it is a unique tool for investigating how tree functional traits influence growth and mortality. Several studies have used the ACGCA model to investigate tree traits, but the model is not readily accessible to the wider scientific community. Thus, we developed an ...
DOI:
10.1016/j.ecoinf.2022.101605

6. Above and belowground woody-biomass and carbon stock estimations at Kunzila watershed, Northwest Ethiopia

Author:
Hailu Shiferaw; Tibebu Kassawmar; Gete Zeleke
Source:
Trees, forests and people 2022 v.7 pp. 100204
ISSN:
2666-7193
Subject:
aesthetics; algorithms; allometry; carbon; carbon dioxide; carbon sinks; ecosystems; shrubs; topography; trees; vegetation cover; watersheds; woody biomass; woody plants; Ethiopia
Abstract:
... Woody-biomass is an important indicator for good vegetation cover, and a healthy environment that provides ecosystems services such as supplying, provisioning, regulating, esthetic, and cultural values. Moreover, woody-biomass stores a very good amount of carbon dioxide as about fifty percent of living organisms are built from carbon. The objective of this study is to estimate the above and belowg ...
DOI:
10.1016/j.tfp.2022.100204

7. Above- and belowground biomass allocation and its regulation by plant density in six common grassland species in China

Author:
Yuanfeng Sun; Yupin Wang; Zhengbing Yan; Luoshu He; Suhui Ma; Yuhao Feng; Haojie Su; Guoping Chen; Yinping Feng; Chengjun Ji; Haihua Shen; Jingyun Fang
Source:
Journal of plant research 2022 v.135 no.1 pp. 41-53
ISSN:
0918-9440
Subject:
allometry; belowground biomass; carbon; carbon sinks; dry matter partitioning; grasslands; greenhouses; intraspecific competition; plant density; research; root shoot ratio; species diversity; China
Abstract:
... Above- and belowground biomass allocation is an essential plant functional trait that reflects plant survival strategies and affects belowground carbon pool estimation in grasslands. However, due to the difficulty of distinguishing living and dead roots, estimation of biomass allocation from field-based studies currently show large uncertainties. In addition, the dependence of biomass allocation o ...
DOI:
10.1007/s10265-021-01353-w

8. Above-ground biomass models for dominant trees species in cacao agroforestry systems in Talamanca, Costa Rica

Author:
Hernán J. Andrade; Milena Segura; Eduardo Somarriba
Source:
Agroforestry systems 2022 v.96 no.4 pp. 787-797
ISSN:
0167-4366
Subject:
Bayesian theory; Citrus aurantiifolia; Cordia alliodora; Mammea americana; Mangifera indica; Nephelium lappaceum; Persea americana; Spondias mombin; Theobroma cacao; aboveground biomass; agroforestry; allometry; carbon; carbon sequestration; databases; fruits; leaves; specific gravity; Costa Rica
Abstract:
... Tree biomass allometric models are essential to estimate biomass, carbon sequestration and nutrient cycling in cacao agroforestry systems and other land uses with woody perennial species. A total of 34 trees of Cordia alliodora, 74 trees of Theobroma cacao and 38 trees of eight fruit species (Inga spp., Citrus aurantifolia, C. sinensis, Spondias mombin, Nephelium lappaceum, Persea americana, Mamme ...
DOI:
10.1007/s10457-022-00741-y

9. Aboveground biomass allocation and additive allometric models of fifteen tree species in northeast China based on improved investigation methods

Author:
Zhenzhao Xu; Wenxian Du; Guang Zhou; Lihou Qin; Shengwang Meng; Jian Yu; Zhen Sun; Bilige SiQing; Qijing Liu
Source:
Forest ecology and management 2022 v.505 pp. 119918
ISSN:
0378-1127
Subject:
Pinus koraiensis; aboveground biomass; administrative management; allometry; bark; coniferous forests; dry matter partitioning; forest ecology; leaves; model validation; models; plant development; prediction; tree and stand measurements; trees; woody plants; China
Abstract:
... Tree allometric models are crucial to accurate forest biomass assessment, but the acquisition of biomass data is one of the most important limitations in establishing biomass models. This study aims to propose an improved investigation method to quickly and practically obtain biomass data, establish species-specific allometric equations and evaluate the biomass allocation pattern for various tree ...
DOI:
10.1016/j.foreco.2021.119918

10. Aboveground biomass equations for black willow (Salix nigra Marsh.) and eastern cottonwood (Populus deltoides Bartr. ex Marsh.)

Author:
Bini Dahal; Krishna P. Poudel; Heidi J. Renninger; Joshua J. Granger; Theodor D. Leininger; Emile S. Gardiner; Ray A. Souter; Randall J. Rousseau
Source:
Trees, forests and people 2022 v.7 pp. 100195
ISSN:
2666-7193
Subject:
Populus deltoides subsp. deltoides; Salix nigra; aboveground biomass; allometry; bioenergy; coppicing; feedstocks; forest land; models; rivers; stand age; tree and stand measurements; trees; Mississippi
Abstract:
... Black willow and eastern cottonwood are fast-growing hardwoods native to river bottoms throughout the southeastern United States, e.g., the Lower Mississippi Alluvial Valley (LMAV), that are often grown as short rotation woody crops (SRWCs) because of their potential to provide high biomass yields in short periods of time. This study focused on developing allometric equations to estimate individua ...
DOI:
10.1016/j.tfp.2022.100195

11. Accommodating heteroscedasticity in allometric biomass models

Author:
Ioan Dutcă; Ronald E. McRoberts; Erik Næsset; Viorel N.B. Blujdea
Source:
Forest ecology and management 2022 v.505 pp. 119865
ISSN:
0378-1127
Subject:
aboveground biomass; administrative management; allometry; forest ecology; forests; heteroskedasticity; prediction; tree and stand measurements; tree height; trees; uncertainty; variance
Abstract:
... Allometric models are commonly used to predict forest biomass. These models typically take nonlinear power-law forms that predict individual tree aboveground biomass (AGB) as functions of diameter at breast height (D) and/or tree height (H). Because the residual variance is in most cases heteroscedastic, accommodating the heteroscedasticity (i.e., heterogeneity of variance) becomes necessary when ...
DOI:
10.1016/j.foreco.2021.119865

12. Activity, heart rate, and energy expenditure of a cold-climate mesocarnivore, the Canada lynx (Lynx canadensis)

Author:
Allyson K. Menzies; Emily K. Studd; Jacob L. Seguin; Rachael E. Derbyshire; Dennis L. Murray; Stan Boutin; Murray M. Humphries
Source:
Canadian journal of zoology 2022 v.100 no.4 pp. 261-272
ISSN:
1480-3283
Subject:
Lynx canadensis; allometry; body size; carnivores; cold; energy expenditure; environmental factors; heart rate; snow; sympatry
Abstract:
... The energetic consequences of body size, behaviour, and fine-scale environmental variation remain understudied, particularly among free-ranging carnivores, due to logistical and methodological challenges of studying them in the field. Here, we present novel activity, heart rate, and metabolic data on free-ranging Canada lynx (Lynx canadensis Kerr, 1792) to (i) investigate intraspecific patterns of ...
DOI:
10.1139/cjz-2021-0142

13. Adaptive Strategies of Seedlings of Four Mediterranean Co-Occurring Tree Species in Response to Light and Moderate Drought: A Nursery Approach

Author:
Marta Pardos; Rafael Calama
Source:
Forests 2022 v.13 no.2 pp. -
ISSN:
1999-4907
Subject:
Juniperus thurifera; Pinus pinea; Quercus faginea; Quercus ilex; allometry; biomass; codominance; drought; drought tolerance; dry matter partitioning; forests; photosystem II; seedling growth; stomatal conductance; trees; water potential
Abstract:
... In Mediterranean environments, light and water are clearly dominant ecological drivers of seedling growth and survival, and their interaction could modify productivity and forest composition. We examine the early response of seedlings of four co-occurring Mediterranean tree species (Pinus pinea, Juniperus thurifera, Quercus ilex and Quercus faginea) grown in the nursery to differing light and wate ...
DOI:
10.3390/f13020154

14. Addressing uncertainty and bias in land use, land use change, and forestry greenhouse gas inventories

Author:
Emily McGlynn; Serena Li; Michael F. Berger; Meredith Amend; Kandice L. Harper
Source:
Climatic change 2022 v.170 no.1-2 pp. 5
ISSN:
0165-0009
Subject:
United Nations Framework Convention on Climate Change; allometry; biomass; carbon dioxide; carbon sequestration; carbon sinks; case studies; climate change; cropland; ecological models; forestry; grasslands; greenhouse gas emissions; greenhouse gases; inventories; land use change; mineral soils; soil carbon; specific gravity; trees; uncertainty; wetland soils
Abstract:
... National greenhouse gas inventories (NGHGIs) will play an increasingly important role in tracking country progress against United Nations (UN) Paris Agreement commitments. Yet uncertainty in land use, land use change, and forestry (LULUCF) NGHGHI estimates may undermine international confidence in emission reduction claims, particularly for countries that expect forests and agriculture to contribu ...
DOI:
10.1007/s10584-021-03254-2

15. Advances in the estimations and applications of critical nitrogen dilution curve and nitrogen nutrition index of major cereal crops. A review

Author:
Xinyu Li; Syed Tahir Ata-UI-Karim; Yue Li; Fei Yuan; Yuxin Miao; Kato Yoichiro; Tao Cheng; Liang Tang; Xingshuai Tian; Xiaojun Liu; Yongchao Tian; Yan Zhu; Weixing Cao; Qiang Cao
Source:
Computers and electronics in agriculture 2022 v.197 pp. 106998
ISSN:
0168-1699
Subject:
agriculture; allometry; biomass production; corn; electronics; genotype; grain yield; nitrogen; nutrient use efficiency; nutritional status; plant growth; prediction; rice; wheat
Abstract:
... Nitrogen (N) is one of the decisive elements for plant growth, crop biomass accumulation, and yield formation of cereal crops. However, managing N in crop production and comparing N use efficiency are challenging without prior knowledge of in-season crop N status. The development of critical N (Nc) dilution curves based on allometry between plant metabolic and structural compartments allows the es ...
DOI:
10.1016/j.compag.2022.106998

16. Allometric Equation for Aboveground Biomass Estimation of Mixed Mature Mangrove Forest

Author:
Hazandy Abdul-Hamid; Fatin-Norliyana Mohamad-Ismail; Johar Mohamed; Zaiton Samdin; Rambod Abiri; Tuan-Marina Tuan-Ibrahim; Lydia-Suzieana Mohammad; Abdul-Majid Jalil; Hamid-Reza Naji
Source:
Forests 2022 v.13 no.2 pp. -
ISSN:
1999-4907
Subject:
aboveground biomass; allometry; biodiversity; biomass production; carbon sequestration; climate; decision making; equations; forest reserves; forestry development; mangrove forests; mangroves (trees); tree and stand measurements; wood density
Abstract:
... The disturbance of mangrove forests could affect climate regulation, hydrological cycles, biodiversity, and many other unique ecological functions and services. Proper biomass estimation and carbon storage potential are needed to improve forest reference on biomass accumulation. The establishment of a site-specific allometric equation is crucial to avert destructive sampling in future biomass esti ...
DOI:
10.3390/f13020325

17. Allometric Equations to Estimate Aboveground Biomass in Spotted Gum (Corymbia citriodora Subspecies variegata) Plantations in Queensland

Author:
Trinh Huynh; Tom Lewis; Grahame Applegate; Anibal Nahuel A. Pachas; David J. Lee
Source:
Forests 2022 v.13 no.3 pp. -
ISSN:
1999-4907
Subject:
Corymbia citriodora; aboveground biomass; allometry; bioenergy; carbon; carbon sequestration; data collection; equations; forests; prediction; tree and stand measurements; wood density; Queensland
Abstract:
... Accurate equations are critical for estimating biomass and carbon accumulation for forest carbon projects, bioenergy, and other inventories. Allometric equations can provide a reliable and accurate method for estimating and predicting biomass and carbon sequestration. Cross-validatory assessments are also essential to evaluate the prediction ability of the selected model with satisfactory accuracy ...
DOI:
10.3390/f13030486

18. Allometric equations may underestimate the contribution of fine roots to mangrove carbon sequestration

Author:
Meng-Quen Chou; Wei-Jen Lin; Chiao-Wen Lin; Hsin-Hsun Wu; Hsing-Juh Lin
Source:
Science of the total environment 2022 v.833 pp. 155032
ISSN:
0048-9697
Subject:
Avicennia marina; Kandelia; allometry; biomass; carbon; carbon sequestration; carbon sinks; environment; fine roots; plant litter; pneumatophores
Abstract:
... The biomass and production of fine roots (diameter < 2 mm) are often omitted or derived simply from allometric equations when calculating mangrove carbon sinks. The purpose of this study was to assess the significance of fine roots by measuring the biomass and production of the fine roots in two mangrove species (Kandelia obovata and Avicennia marina) with distinct root structures. The aboveground ...
DOI:
10.1016/j.scitotenv.2022.155032

19. Allometric models to predict the individual aboveground biomass of shrubs of Malagasy xerophytic thickets

Author:
Josoa R. Randriamalala; Heriniaina O. Radosy; Miora Ramanakoto; Hanitriniaina Razafindrahanta; Jean-Michel Ravoninjatovo; Rijatahiana S. Haingomanantsoa; Tahiana Ramananantoandro
Source:
Journal of arid environments 2022 v.202 pp. 104751
ISSN:
0140-1963
Subject:
aboveground biomass; allometry; ecosystems; shrubs; specific gravity; tree and stand measurements; trees; vegetation; Madagascar
Abstract:
... Xerophytic thicket (XT) is a shrubby vegetation found in the semi-arid southern and south-western Madagascar. Above ground biomass (AGB) is a key element to understand how this ecosystem is operating and then to design and implement any sustainable management strategy. This study aimed to build AGB allometric models for Malagasy XT shrubs. One hundred and ninety-eight individuals belonging to 20 X ...
DOI:
10.1016/j.jaridenv.2022.104751

20. Allometric relationships and growth patterns for California halibut (Paralichthys californicus) under land-base farm-like conditions

Author:
German E. Merino; Douglas E. Conklin; Raul H. Piedrahita
Source:
Aquaculture 2022 v.547 pp. 737468
ISSN:
0044-8486
Subject:
Paralichthys californicus; allometry; aquaculture; biometry; computer software; demersal fish; image analysis; pelagic fish; surface area
Abstract:
... For pelagic fish, length and weight measurements are common in aquaculture facilities to determine growth rates and rearing stocking densities. Body surface area is required to estimate stocking densities in the case of demersal fish species such as California halibut (Paralichthys californicus). Using image analysis processing technology allowed for the first time to determine body surface area ( ...
DOI:
10.1016/j.aquaculture.2021.737468