PubAg

Main content area

You searched for: Subject "trees" Remove constraint Subject: "trees"
Start Over

Search

58,877  Search Results

« Previous | 1 - 20 of 58,877 |
Number of results to display per page

Search Results

1. Missing link in Late Antiquity? A critical examination of Hollstein’s Central European Oak Chronology

Author:
Rzepecki, Andreas; Neyses-Eiden, Mechthild; Frank, Thomas; Diethelm, Barbara; Herzig, Franz; Tegel, Willy
Source:
Dendrochronologia 2019 v.54 pp. 20-28
ISSN:
1125-7865
Subject:
trees,   etc   ; dendrochronology; Belgium; France; Germany;     Show all 5 Subjects
Abstract:
... In 1980 Ernst Hollstein published his Central European Oak Chronology, which covers a period from 724 BCE to 1974 CE. Besides a later correction of the end date of the sampling site chronologies Kirnsulzbach (Germany) and Gustavsburg (Germany) this master chronology has since not been changed and still remains one of the most important bases for dendrochronological dating in western Germany. It st ...
DOI:
10.1016/j.dendro.2019.01.003

2. Reconstruction of root systems in Cryptomeria japonica using root point coordinates and diameters

Author:
Ohashi, Mizue; Ikeno, Hidetoshi; Sekihara, Kotaro; Tanikawa, Toko; Dannoura, Masako; Yamase, Keitaro; Todo, Chikage; Tomita, Takahiro; Hirano, Yasuhiro
Source:
Planta 2019 v.249 no.2 pp. 445-455
ISSN:
0032-0935
Subject:
trees,   etc   ; Cryptomeria japonica; algorithms; models; root systems;     Show all 5 Subjects
Abstract:
... MAIN CONCLUSION: We developed simple algorithms for reconstructing tree root system architecture using only the root point coordinate and diameter, which can be systematically obtained without digging up the root systems. Root system architecture (RSA) is strongly related to various root functions of the tree. The aim of this study was to develop a three-dimensional (3D) RSA model using systematic ...
DOI:
10.1007/s00425-018-3011-x

3. Towards the extremes: A critical analysis of pointer year detection methods

Author:
Jetschke, Gottfried; van der Maaten, Ernst; van der Maaten-Theunissen, Marieke
Source:
Dendrochronologia 2019 v.53 pp. 55-62
ISSN:
1125-7865
Subject:
trees,   etc   ; growth rings; plant growth; plant response;     Show all 4 Subjects
Abstract:
... To study growth responses of trees to extreme events, analyses of so-called ‘pointer years’ are often performed. Thereby, the term pointer year refers to years in which a majority of trees shows extraordinary growth responses, like very narrow (or wide) ring widths. A wide variety of methods has been used to analyze pointer years, hampering comparisons between studies. The latter illustrates that ...
DOI:
10.1016/j.dendro.2018.11.004

4. Urban trees, house price, and redevelopment pressure in Tampa, Florida

Author:
Donovan, Geoffrey H.; Landry, Shawn; Winter, Cody
Source:
Urban forestry & urban greening 2019 v.38 pp. 330-336
ISSN:
1618-8667
Subject:
trees,   etc   ; autocorrelation; models; prices; sales; Florida;     Show all 6 Subjects
Abstract:
... We examined the relationship between urban trees and the sales price of single-family homes in Tampa, Florida. We chose Tampa, because the city is facing major redevelopment pressure that may impact the association between trees and house price. In particular, a frequently voiced view in Tampa’s development community is that trees adversely affect the value of houses that are being sold for redeve ...
DOI:
10.1016/j.ufug.2019.01.014

5. A multi-faceted CNN architecture for automatic classification of mobile LiDAR data and an algorithm to reproduce point cloud samples for enhanced training

Author:
Kumar, Bhavesh; Pandey, Gaurav; Lohani, Bharat; Misra, Subhas C.
Source:
ISPRS journal of photogrammetry and remote sensing 2019 v.147 pp. 80-89
ISSN:
0924-2716
Subject:
trees,   etc   ; algorithms; data collection; lidar; vegetation;     Show all 5 Subjects
Abstract:
... Mobile Laser Scanning (MLS) data of outdoor environment are typically characterised by occlusion, noise, clutter, large data size and high quantum of information which makes their classification a challenging problem. This paper presents three deep Convolutional Neural Network (CNN) architectures in three dimension (3D), namely single CNN (SCN), multi-faceted CNN (MFC) and MFC with reproduction (M ...
DOI:
10.1016/j.isprsjprs.2018.11.006

6. An innovative tomographic technique integrated with acoustic-laser approach for detecting defects in tree trunk

Author:
Qiu, Qiwen; Qin, Renyuan; Lam, Josh H.M.; Tang, Alvin M.C.; Leung, Mike W.K.; Lau, Denvid
Source:
Computers and electronics in agriculture 2019 v.156 pp. 129-137
ISSN:
0168-1699
Subject:
trees,   etc   ; air; electromagnetic radiation; tomography; tree trunk;     Show all 5 Subjects
Abstract:
... In this study, we develop a tomographic technique based on the use of both mechanical wave (i.e. stress wave and acoustic wave) and electromagnetic wave (i.e. laser beam) for evaluating the defects in tree trunk. In the experimental work, the tomographic technique was used to inspect tree trunk with an air hole fabricated at the centric position and air gaps made at 5–50 mm near from surface. The ...
DOI:
10.1016/j.compag.2018.11.017

7. Correction to: A paradox of latitudinal leaf defense strategies in deciduous and evergreen broadleaved trees

Author:
Saihanna, Saihanna; Tanaka, Tomoe; Okamura, Yu; Kusumoto, Buntarou; Shiono, Takayuki; Hirao, Toshihide; Kubota, Yasuhiro; Murakami, Masashi
Source:
Ecological research 2018 v.33 no.5 pp. 1019
ISSN:
0912-3814
Subject:
broadleaved trees,   etc   ; Internet; leaves;     Show all 3 Subjects
Abstract:
... The article “A paradox of latitudinal leaf defense strategies in deciduous and evergreen broadleaved trees”, written by Saihanna Saihanna, Tomoe Tanaka, Yu Okamura, Buntarou Kusumoto, Takayuki Shiono, Toshihide Hirao, Yasuhiro Kubota, and Masashi Murakami, was originally published electronically on the publisher’s internet portal (currently SpringerLink) on 01 June 2018 without open access. ...
DOI:
10.1007/s11284-018-1641-x

8. Correction to: Effects of dust on forest tree health in Zagros oak forests

Author:
Moradi, A.; Taheri Abkenar, K.; Afshar Mohammadian, M.; Shabanian, N.
Source:
Environmental monitoring and assessment 2018 v.190 no.9 pp. 534
ISSN:
0167-6369
Subject:
forest trees,   etc   ; dust; forests;     Show all 3 Subjects
Abstract:
... The original version of this article unfortunately contained an error in the affiliation section. ...
DOI:
10.1007/s10661-018-6917-7

9. Loading experienced by a tie-in point during ascents

Author:
Kane, Brian
Source:
Urban forestry & urban greening 2018 v.34 pp. 78-84
ISSN:
1618-8667
Subject:
trees,   etc   ; harness; mortality;     Show all 3 Subjects
Abstract:
... Working in trees is an inherently dangerous profession, with a higher than average fatality rate. Climbers secure themselves with a rope and harness to a tie-in point to ascend into and work in a tree, but it can be difficult—if not impossible—to assess the safety of a tie-in point from the ground. Very little experimental work has described the loads associated with ascending into and working in ...
DOI:
10.1016/j.ufug.2018.06.001

10. The impact of ancient tree form on modern landscape preferences

Author:
Townsend, Joseph B.; Barton, Susan
Source:
Urban forestry & urban greening 2018 v.34 pp. 205-216
ISSN:
1618-8667
Subject:
trees,   etc   ; canopy; emotions; landscapes;     Show all 4 Subjects
Abstract:
... Empirical studies of the relationship between aspects of the landscape and human emotions have been fruitful over the last few decades. In fact, we are awash in data that describes a correlation between natural landscapes and positive human feelings. While this plethora of data has been useful to various disciplines, it has not lead to an explanatory theory as to why and how the landscape should h ...
DOI:
10.1016/j.ufug.2018.06.004

11. Estimating tree stem density and diameter distribution in single-scan terrestrial laser measurements of field plots: a simulation study

Author:
Olofsson, Kenneth; Olsson, Håkan
Source:
Scandinavian journal of forest research 2018 v.33 no.4 pp. 365-377
ISSN:
1651-1891
Subject:
trees,   etc   ; forests; inventories;     Show all 3 Subjects
Abstract:
... The single-scan setup of terrestrial laser scanning of a forest field plot has advantages compared to the multi-scan setup: the speed of operation and that there is no need of a co-registration of the different scans. However in a single-scan setup some of the trees are shaded by others and therefore not detected in the scan. A field inventory solution must take this fact into account. This simula ...
DOI:
10.1080/02827581.2017.1368698

12. Isolation rearing does not constrain social plasticity in a family-living lizard

Author:
Riley, Julia L; Guidou, Côme; Fryns, Caroline; Mourier, Johann; Leu, Stephan T; Noble, Daniel W A; Byrne, Richard W; Whiting, Martin J
Source:
Behavioral ecology 2018 v.29 no.3 pp. 563-573
ISSN:
1465-7279
Subject:
trees,   etc   ; lizards; plasticity; rearing;     Show all 4 Subjects
Abstract:
... Loner lizards can become savvy socialites. An animal’s social experience while growing up often influences how they interact socially, and it may also constrain their ability to adapt to dynamic social situations. Yet, we find that in the tree skink, a family-living lizard, social plasticity is not limited by their social experience during development. The tree skink has a variable social system, ...
DOI:
10.1093/beheco/ary007

13. Robustness of the approximate likelihood of the protracted speciation model

Author:
Simonet, C.; Scherrer, R.; Rego‐Costa, A.; Etienne, R. S.
Source:
Journal of evolutionary biology 2018 v.31 no.3 pp. 469-479
ISSN:
1010-061X
Subject:
trees,   etc   ; extinction; models; phylogeny;     Show all 4 Subjects
Abstract:
... The protracted speciation model presents a realistic and parsimonious explanation for the observed slowdown in lineage accumulation through time, by accounting for the fact that speciation takes time. A method to compute the likelihood for this model given a phylogeny is available and allows estimation of its parameters (rate of initiation of speciation, rate of completion of speciation and extinc ...
DOI:
10.1111/jeb.13233

14. Landslide susceptibility modeling using Reduced Error Pruning Trees and different ensemble techniques: Hybrid machine learning approaches

Author:
Pham, Binh Thai; Prakash, Indra; Singh, Sushant K.; Shirzadi, Ataollah; Shahabi, Himan; Tran, Thi-Thu-Trang; Bui, Dieu Tien
Source:
Catena 2019 v.175 pp. 203-218
ISSN:
0341-8162
Subject:
trees,   etc   ; artificial intelligence; graphs; landscapes; landslides; models; prediction; pruning;     Show all 8 Subjects
Abstract:
... Nowadays, a number of machine learning prediction methods are being applied in the field of landslide susceptibility modeling of the large area especially in the difficult hilly terrain. In the present study, hybrid machine learning approaches of Reduced Error Pruning Trees (REPT) and different ensemble techniques were used for the construction of four novel hybrid models namely Bagging based Redu ...
DOI:
10.1016/j.catena.2018.12.018

15. No resonant response of Scots pine trees to wind excitation

Author:
Schindler, Dirk; Mohr, Manuel
Source:
Agricultural and forest meteorology 2019 v.265 pp. 227-244
ISSN:
0168-1923
Subject:
trees,   etc   ; Pinus sylvestris; air flow; canopy; energy; roots; wavelet; wind;     Show all 8 Subjects
Abstract:
... The response of four Scots pine trees to wind excitation was measured and analyzed. We investigated whether wind-induced tree sway in the fundamental mode is affected and enhanced by resonance effects between cyclic wind loading and oscillatory tree response. By combining results from wavelet analysis and analysis of phase-amplitude coupling, we demonstrate that the response in the fundamental mod ...
DOI:
10.1016/j.agrformet.2018.11.021

16. Factors influencing the accuracy of ground-based tree-height measurements for major European tree species

Author:
Stereńczak, Krzysztof; Mielcarek, Miłosz; Wertz, Bogdan; Bronisz, Karol; Zajączkowski, Grzegorz; Jagodziński, Andrzej M.; Ochał, Wojciech; Skorupski, Maciej
Source:
Journal of environmental management 2019 v.231 pp. 1284-1292
ISSN:
0301-4797
Subject:
trees,   etc   ; biometry; forests; landscapes; topography; tree age; tree height; Poland;     Show all 8 Subjects
Abstract:
... Tree height is one of the most important forest characteristics and is one of the crucial measurements taken for either practical or scientific reasons. However, the accuracy of a tree-height measurement may vary in relation to many factors. The work described here thus sought to evaluate the accuracy of ground-based tree-height measurements for major forest-forming tree species of the temperate a ...
DOI:
10.1016/j.jenvman.2018.09.100

17. Branching out: new insights into the genetic regulation of shoot architecture in trees

Author:
Hill, Joseph L; Hollender, Courtney A
Source:
Current opinion in plant biology 2019 v.47 pp. 73-80
ISSN:
1369-5266
Subject:
trees,   etc   ; gene dosage; genes; gravitropism; models; perennials; sequence analysis;     Show all 7 Subjects
Abstract:
... Directional growth in all plants involves both phototropic and gravitropic responses. Accordingly, mechanisms controlling shoot architecture throughout the plant kingdom are likely similar. However, as forms vary between species due in part to gene copy number and functional divergence, some aspects of how plants predetermine and regulate architecture can differ. This is especially true when compa ...
DOI:
10.1016/j.pbi.2018.09.010

18. Floral uniformity through evolutionary time in a species‐rich tree lineage

Author:
Vasconcelos, Thais N. C.; Chartier, Marion; Prenner, Gerhard; Martins, Aline C.; Schönenberger, Jürg; Wingler, Astrid; Lucas, Eve
Source:
Thenew phytologist 2019 v.221 no.3 pp. 1597-1608
ISSN:
0028-646X
Subject:
trees,   etc   ; Myrcia; ecological competition; ecosystems; environmental factors; flowers; phylogeny; pollination;     Show all 8 Subjects
Abstract:
... Changes in floral morphology are expected across evolutionary time and are often promoted as important drivers in angiosperm diversification. Such a statement, however, is in contrast to empirical observations of species‐rich lineages that show apparent conservative floral morphologies even under strong selective pressure to change from their environments. Here, we provide quantitative evidence fo ...
DOI:
10.1111/nph.15453

19. Pay little, get little; pay more, get a little more: A framed forest experiment in Tanzania

Author:
Handberg, Øyvind Nystad; Angelsen, Arild
Source:
Ecological economics 2019 v.156 pp. 454-467
ISSN:
0921-8009
Subject:
trees,   etc   ; ecosystem services; field experimentation; forest conservation; forests; motivation; Tanzania;     Show all 7 Subjects
Abstract:
... How do different levels of individual payments for environmental services (PES) affect intrinsic and social motivations for forest conservation? Does introducing small PES crowd out these motivations? This paper presents findings from framed field experiments (FFE) conducted with local forest users in Tanzania. The payoff structure represents a common-pool resource situation; participants' payoffs ...
DOI:
10.1016/j.ecolecon.2016.09.025

20. Phylogenetic clustering in beneficial attributes of tree species directly linked to provisioning, regulating and cultural ecosystem services

Author:
Oka, Chihiro; Aiba, Masahiro; Nakashizuka, Tohru
Source:
Ecological indicators 2019 v.96 pp. 477-495
ISSN:
1470-160X
Subject:
trees,   etc   ; cluster analysis; ecosystem services; ecosystems; environmental indicators; phylogeny; Japan;     Show all 7 Subjects
Abstract:
... Phylogenetic diversity is expected to be an important predictor of ecosystem multifunctionality because distant relatives are often more functionally different than close relatives. However, the general extent of non-random linkages between phylogeny and ecosystem services remains unclear. In this study, we examined phylogenetic clustering and associations of beneficial attributes of tree species ...
DOI:
10.1016/j.ecolind.2018.09.035