scholarly journals Morphological diversity of mindi (Melia azedarach) from agroforestry system in North Sumatra, Indonesia

2021 ◽  
Vol 4 (02) ◽  
pp. 54-60
Author(s):  
Ridahati Rambey ◽  
Arida Susilowati ◽  
Nelly Anna
Keyword(s):  
Woody Plant ◽  
Morphological Differentiation ◽  
Morphological Diversity ◽  
Morphological Characters ◽  
Agroforestry System ◽  
Melia Azedarach ◽  
Individual Tree ◽  
Growth Character ◽  
Individual Trees ◽  
North Sumatra

Mindi (Melia azedarach) is a fast-growing woody plant with potential forcommunity forest development. Mindi wood is used to furniture material, parquet, fancy plywood, and fancy laminated veneer, and it is also exported. Although the communityforest in Deli Serdang Regency is established as a seed source for mindi in North Sumatra,information on its diversity is still lacking. The aim of this research was to get informationabout morphological differentiation of mindi in Deli Serdang Regency. Direct observationand measurement on morphological and growth character of mindi had been conducted inthree populations of community forest in Deli Serdang Regency. Those were Percut SeiTuan population, Biru-Biru population, and Pancur Batu population. The result showed thatof 19 observed morphological characters, there were two characters: number of leave andfruit weight able to differentiate the populations—individual tree from three populationclustering into three groups. The first cluster consists of 35 individual trees from Percut SeiTuan (7 trees), Biru-Biru (12 trees), and Pancur Batu (16 trees). The second cluster consistof 24 trees originated from Percut Sei Tuan (13 trees), Biru-Biru (8 trees), and Pancur Batu(3 trees). A third cluster consists of one tree from Pancur Batu.

scholarly journals Exploration and identification of Anredera cordifolia morphological characters in the highlands and lowlands

2020 ◽  
Vol 21 (6) ◽  
Author(s):  
Yaya Hasanah ◽  
Lisa Mawarni
Keyword(s):  
Morphological Characteristics ◽  
Morphological Diversity ◽  
Morphological Characters ◽  
Morphological Characterization ◽  
Leaf Color ◽  
Plant Selection ◽  
Breeding Programs ◽  
Relationship Of ◽  
North Sumatra ◽  
Descriptive Method

Abstract. Hasanah Y, Mawarni L. 2020. Exploration and identification of Anredera cordifolia morphological characters in the highlands and lowlands. Biodiversitas 21: 2759-2766. Information about genetic diversity and relationships between accessions is very important in plant breeding programs, because with the availability of this information, it is easier to determine relationship between accessions that can be used as a basis for plant selection. The objective of the research was to evaluate the morphological characteristics and relationship of binahong or Anredera cordifolia (Ten.) Steenis) accessions in the lowlands and highlands. The study was conducted in Karo (highlands) and Medan (lowlands), North Sumatra, Indonesia, from May to August 2019. This research used a descriptive method. Before the survey and exploration are conducted, first a pre-survey was conducted by gathering information from key informants and other informants. The characteristic of morphological diversity A. cordifolia can be distinguished based on leaf color, stem shape, axillary tuber, rhizome, and the presence of flowers. The dendrogram relationship between accessions is based on a genetic similarity matrix using cluster analysis. Analysis of qualitative morphological characters revealed the existence of variability among A. cordifolia accessions. There is a far relationship relation between A. cordifolia plants in Karo and Medan with Eucludian range of 0.446 to 57.725, hence resulting in two clusters that show differences in the variation of A. cordifolia plants. There is a distant relationship relation with M4 and M7 accessions with a dissimilar distance of 57,725 and the closest relationship with accession K1 and K2 with a dissimilar distance of 0.446. Therefore, morphological characterization in the research is valuable to understand the variability of genetic of A. cordifolia accessions in the lowland and highland in North Sumatra.

scholarly journals Adjudicating Perspectives on Forest Structure: How Do Airborne, Terrestrial, and Mobile Lidar-Derived Estimates Compare?

2021 ◽  
Vol 13 (12) ◽  
pp. 2297
Author(s):  
Jonathon J. Donager ◽  
Andrew J. Sánchez Meador ◽  
Ryan C. Blackburn
Keyword(s):  
Ponderosa Pine ◽  
Laser Scanning ◽  
Canopy Cover ◽  
Basal Area ◽  
Tree Height ◽  
Absolute Error ◽  
Forest Monitoring ◽  
Individual Tree ◽  
Structural Configurations ◽  
Individual Trees

Applications of lidar in ecosystem conservation and management continue to expand as technology has rapidly evolved. An accounting of relative accuracy and errors among lidar platforms within a range of forest types and structural configurations was needed. Within a ponderosa pine forest in northern Arizona, we compare vegetation attributes at the tree-, plot-, and stand-scales derived from three lidar platforms: fixed-wing airborne (ALS), fixed-location terrestrial (TLS), and hand-held mobile laser scanning (MLS). We present a methodology to segment individual trees from TLS and MLS datasets, incorporating eigen-value and density metrics to locate trees, then assigning point returns to trees using a graph-theory shortest-path approach. Overall, we found MLS consistently provided more accurate structural metrics at the tree- (e.g., mean absolute error for DBH in cm was 4.8, 5.0, and 9.1 for MLS, TLS and ALS, respectively) and plot-scale (e.g., R2 for field observed and lidar-derived basal area, m2 ha−1, was 0.986, 0.974, and 0.851 for MLS, TLS, and ALS, respectively) as compared to ALS and TLS. While TLS data produced estimates similar to MLS, attributes derived from TLS often underpredicted structural values due to occlusion. Additionally, ALS data provided accurate estimates of tree height for larger trees, yet consistently missed and underpredicted small trees (≤35 cm). MLS produced accurate estimates of canopy cover and landscape metrics up to 50 m from plot center. TLS tended to underpredict both canopy cover and patch metrics with constant bias due to occlusion. Taking full advantage of minimal occlusion effects, MLS data consistently provided the best individual tree and plot-based metrics, with ALS providing the best estimates for volume, biomass, and canopy cover. Overall, we found MLS data logistically simple, quickly acquirable, and accurate for small area inventories, assessments, and monitoring activities. We suggest further work exploring the active use of MLS for forest monitoring and inventory.

Species delimitation of colour polymorphic Cladophorus (Coleoptera: Lycidae) from New Guinea

Zootaxa ◽  
2017 ◽  
Vol 4320 (3) ◽  
pp. 505 ◽  
Author(s):  
ROMANA KALOUSOVA ◽  
LADISLAV BOCAK
Keyword(s):  
Phylogenetic Analysis ◽  
Mitochondrial Dna ◽  
Related Species ◽  
Species Delimitation ◽  
Morphological Differentiation ◽  
Morphological Characters ◽  
Molecular Data ◽  
Closely Related Species ◽  
Dna Fragment ◽  
Colour Patterns

Cladophorus Guérin-Méneville, 1830 are endemic Papuan net-winged beetles which take part in highly diverse Müllerian mimicry rings. Available specimens were sequenced for cox1–tRNA-Leu–cox2 mitochondrial DNA fragment and the species delimitations were based on the genetic distance, phylogenetic analysis, and morphology. Three earlier described species were identified in the recently collected material and further 10 species are described: C. pallescens sp. nov., C. bicolor sp. nov., C. craterensis sp. nov., C. motykai sp. nov., C. mindikensis sp. nov., C. kailakiensis sp. nov., C. manokwarensis sp. nov., C. haiaensis sp. nov., C. humeralis sp. nov., and C. boceki sp. nov. DNA-based identifications provided some ambiguous results and closely related species could not be robustly delimited using solely molecular data. Additionally, the species limits were based on clearly defined morphological characters and the morphological differentiation was found unlinked from the genetic divergence. Colour patterns cannot be used for identification because all species available in more specimens were polymorphic and followed various local co-mimics. The Papuan fauna of Cladophorus is very diverse and the closely related species regularly occur in limited regions. Differentiation within restricted ranges is therefore considered as the main speciation mode. 

Assyrian sacred trees in the Brooklyn Museum

Iraq ◽  
1994 ◽  
Vol 56 ◽  
pp. 123-133 ◽  
Author(s):  
Pauline Albenda
Keyword(s):  
Present Author ◽  
Ninth Century ◽  
Palm Tree ◽  
The West ◽  
Individual Tree ◽  
Sacred Tree ◽  
The Individual ◽  
Individual Trees ◽  
Brooklyn Museum ◽  
Tree Type

The Brooklyn Museum houses twelve stone slabs with carved decoration from the Northwest Palace of Ashurnasirpal II. The motif of a stylized tree — the so-called Sacred Tree (see Figs. 1, 4, 6) — appears on seven of those slabs which come from rooms F, I, L, S, T of the ninth century palace at Nimrud. These tree renderings are representative of the sacred tree-type found in ten rooms of the royal residence and the west wing. Approximately 96 sacred trees, in two-register arrangement, appeared on the pictorial decorations in room I; the same motif occurred about 75 times in one-register arrangement on the reliefs of the other rooms. The abundance of the sacred tree motif on the wall decorations of the Northwest Palace attests to the significance of this plant. Its design deserves investigation; in Layard's words, “the tree, evidently a sacred symbol, is elaborately and tastefully formed.”In his study of the Ashurnasirpal II reliefs in American collections, Stearns did not attempt to list the sacred trees, because “variations in the sacred tree occur only in minor details,” and “the tree in itself is rarely useful in identifying the location of the reliefs.” These statements make clear Stearns' belief that the sacred trees were nearly alike. Other scholars, notably Weidner and Reade, have pointed out that on a number of slabs now in American and European museums are carvings of matching half trees, therefore indicating that when paired, these trees belonged to adjoining slabs originally. In trying to match half trees, one finds that individual sacred trees do differ in the rendering of specific details. Bleibtreu, in her analysis of the sacred tree-type, lists three variants of the flower found on the palmette-garland framing the individual tree on three sides. The present author, after examining the sacred trees carved on the slabs in The Brooklyn Museum, concludes that the design of the tree-type is more varied than heretofore presumed, and that its construction is more complex than indicated in previous descriptions of the subjects. An analysis of the Assyrian sacred tree-type may lead to possible conclusions regarding its intended image: a stylized palm tree, a cult object, an emblem of vegetation or “tree of life”, an imperial symbol, or a combination of those forms. In addition, one may consider to what extent the rendering of individual trees was the consequence of artistic inventiveness.

scholarly journals Automatic Extraction of Grasses and Individual Trees in Urban Areas Based on Airborne Hyperspectral and LiDAR Data

2020 ◽  
Vol 12 (17) ◽  
pp. 2725
Author(s):  
Qixia Man ◽  
Pinliang Dong ◽  
Xinming Yang ◽  
Quanyuan Wu ◽  
Rongqing Han
Keyword(s):  
Urban Areas ◽  
Three Dimensional ◽  
Hyperspectral Data ◽  
Classification Method ◽  
Urban Vegetation ◽  
Individual Tree ◽  
Cloud Data ◽  
Random Forest Classification ◽  
The Individual ◽  
Individual Trees

Urban vegetation extraction is very important for urban biodiversity assessment and protection. However, due to the diversity of vegetation types and vertical structure, it is still challenging to extract vertical information of urban vegetation accurately with single remotely sensed data. Airborne light detection and ranging (LiDAR) can provide elevation information with high-precision, whereas hyperspectral data can provide abundant spectral information on ground objects. The complementary advantages of LiDAR and hyperspectral data could extract urban vegetation much more accurately. Therefore, a three-dimensional (3D) vegetation extraction workflow is proposed to extract urban grasses and trees at individual tree level in urban areas using airborne LiDAR and hyperspectral data. The specific steps are as follows: (1) airborne hyperspectral and LiDAR data were processed to extract spectral and elevation parameters, (2) random forest classification method and object-based classification method were used to extract the two-dimensional distribution map of urban vegetation, (3) individual tree segmentation was conducted on a canopy height model (CHM) and point cloud data separately to obtain three-dimensional characteristics of urban trees, and (4) the spatial distribution of urban vegetation and the individual tree delineation were assessed by validation samples and manual delineation results. The results showed that (1) both the random forest classification method and object-based classification method could extract urban vegetation accurately, with accuracies above 99%; (2) the watershed segmentation method based on the CHM could extract individual trees correctly, except for the small trees and the large tree groups; and (3) the individual tree segmentation based on point cloud data could delineate individual trees in three-dimensional space, which is much better than CHM segmentation as it can preserve the understory trees. All the results suggest that two- and three-dimensional urban vegetation extraction could play a significant role in spatial layout optimization and scientific management of urban vegetation.

scholarly journals Symmetry breaking of the cellular lobes closely relates to phylogenetic structure within green microalgae of theMicrasteriaslineage (Zygnematophyceae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e6098 ◽  
Author(s):  
Jiri Neustupa ◽  
Jan Stastny
Keyword(s):  
Symmetry Breaking ◽  
Morphological Diversity ◽  
Morphological Characters ◽  
Morphological Integration ◽  
Model Systems ◽  
Green Microalgae ◽  
Phylogenetic Structure ◽  
Morphological Asymmetry ◽  
Hierarchical Levels ◽  
Average Shape

Green microalgae of theMicrasteriaslineage are unicellular microorganisms with modular morphology consisting of successively differentiated lobes. Due to their morphological diversity and peculiar morphogenesis, these species are important model systems for studies of cytomorphogenesis and cellular plasticity. Interestingly, the phylogenetic structure of theMicrasteriaslineage and most other Desmidiales is poorly related to the traditional morphological characters used for delimitation of taxa. In this study, we focused on symmetry breaking between adjacent cellular lobes in relation to phylogeny of the studied species. While pronounced morphological asymmetry between the adjacent lobes is typical for some species, others have been characterized by the almost identical morphologies of these structures. We asked whether there is any detectable average shape asymmetry between the pairs of lobes and terminal lobules in 19Micrasteriasspecies representing all major clades of this desmidiacean lineage. Then, we evaluated whether the asymmetric patterns among species are phylogenetically structured. The analyses showed that the phylogeny was in fact strongly related to the patterns of morphological asymmetry between the adjacent cellular lobes. Thus, evolution of the asymmetric development between the adjacent lobes proved to be the key event differentiating cellular shape patterns ofMicrasterias. Conversely, the phylogeny was only weakly related to asymmetry between the pairs of terminal lobules. The subsequent analyses of the phylogenetic morphological integration showed that individual hierarchical levels of cellular morphology were only weakly coordinated with regard to asymmetric variation among species. This finding indicates that evolutionary differentiation of morphogenetic processes leading to symmetry breaking may be relatively independent at different branching levels. Such modularity is probably the key to the evolvability of cellular shapes, leading to the extraordinary morphological diversity of these intriguing microalgae.

scholarly journals Spatial Models With Inter-Tree Competition From Airborne Laser Scanning Improve Estimates of Genetic Variance

2021 ◽  
Vol 11 ◽  
Author(s):  
David Pont ◽  
Heidi S. Dungey ◽  
Mari Suontama ◽  
Grahame T. Stovold
Keyword(s):  
Laser Scanning ◽  
Management Practices ◽  
Spatial Models ◽  
Airborne Laser Scanning ◽  
Tree Level ◽  
Residual Variance ◽  
Spatial Effects ◽  
Individual Tree ◽  
Airborne Laser ◽  
Individual Trees

Phenotyping individual trees to quantify interactions among genotype, environment, and management practices is critical to the development of precision forestry and to maximize the opportunity of improved tree breeds. In this study we utilized airborne laser scanning (ALS) data to detect and characterize individual trees in order to generate tree-level phenotypes and tree-to-tree competition metrics. To examine our ability to account for environmental variation and its relative importance on individual-tree traits, we investigated the use of spatial models using ALS-derived competition metrics and conventional autoregressive spatial techniques. Models utilizing competition covariate terms were found to quantify previously unexplained phenotypic variation compared with standard models, substantially reducing residual variance and improving estimates of heritabilities for a set of operationally relevant traits. Models including terms for spatial autocorrelation and competition performed the best and were labelled ACE (autocorrelation-competition-error) models. The best ACE models provided statistically significant reductions in residuals ranging from −65.48% for tree height (H) to −21.03% for wood stiffness (A), and improvements in narrow sense heritabilities from 38.64% for H to 14.01% for A. Individual tree phenotyping using an ACE approach is therefore recommended for analyses of research trials where traits are susceptible to spatial effects.

scholarly journals Keragaman Mutan Wijen (Sesamum indicum L.) Berdasarkan Karakter Kualitatif; Diversity of Sesame Mutants (Sesamum indicum L.) Based on Qualitative Characters

2021 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
Vina Eka Aristya
Keyword(s):  
Genetic Variability ◽  
Morphological Diversity ◽  
Structural Diversity ◽  
Morphological Characters ◽  
Sesamum Indicum ◽  
Mutation Induction ◽  
Second Phase ◽  
Genotype Distribution ◽  
Qualitative Characters ◽  
Mutant Lines

<p class="Abstract" align="center"><strong>ABSTRAK</strong></p><p class="Abstract"><em>Sesamum indicum</em> L. adalah salah satu tanaman alternatif penghasil minyak nabati penting. Pendekatan pemuliaan melalui induksi mutasi berusaha untuk menghasilkan variabilitas baru populasi wijen, yang secara umum tersusun dari individu homozigot. Karakter morfologi berguna untuk mengidentifikasi galur dan memastikan hasil pemuliaan mutasi. Tujuan penelitian ini adalah untuk mengevaluasi keragaman morfologi wijen hasil mutasi berdasarkan 26 karakter kualitatif. Penggalian informasi dengan metode analisis kelompok juga dikaji untuk menggambarkan variabilitas genetik pada 57 galur mutan wijen (jenis hitam dan putih) generasi M4 dan M5. Penelitian ini dilakukan dalam dua tahap: tahap pertama terdiri 18 galur generasi M4, dievaluasi pada Maret-Agustus 2015; tahap kedua terdiri atas 39 galur M5, ditanam pada November 2015 hingga April 2016. Pemeriksaan penampilan kualitatif mengikuti panduan <em>descriptor list</em> untuk wijen. Secara umum, penilaian representatif dari sifat kualitatif pada galur mutan wijen generasi M4 akan diikuti oleh keturunan generasi M5. Dendrogram dibangun untuk membedakan galur menjadi kelompok berdasarkan matriks tingkat kemiripan. Struktur populasi utama dari 57 galur berdasarkan sifat kualitatif dikategorikan dalam dua kelompok besar. Materi genotipe kelompok I diklasifikasikan menjadi dua sub-kelompok, terdiri 17 dan 31 galur. Sub-kelompok ini menjadi bagian distribusi genotipe terbesar. Kelompok II tersusun oleh 9 galur, mayoritas dari M4. Nilai korelasi antar karakter bervariasi antara 0,7176 hingga 1,0. Keragaman morfologi antar galur wijen dipengaruhi oleh sifat genetik dibandingkan faktor lingkungan. Studi ini membantu seleksi galur terpilih berdasarkan kestabilan fenotipe. Evaluasi keragaman struktur populasi wijen mutan bermanfaat untuk program pemuliaan.</p><p class="Abstract" align="center"><strong>ABSTRACT</strong></p><p class="Abstract"><em>Sesamum indicum</em> L. is one of the alternative crops that produces vegetative oil. The plant breeding approach through mutation induction could produce new genetic variability in sesame populations, which are generally composed of homozygous individuals. The study aims were to determine the diversity of sesame-mutant lines based on 26 qualitative characters. Cluster analysis method was carried out to describe the genetic variability of 57 sesame mutant lines (consist of black and white types) 4<sup>th</sup> (M4) and 5<sup>th</sup> generations (M5). The study was done in two phases, the first phases consisted of 18 M4 lines planted in March-August 2015; the second phase consisted 39 M5 lines planted in November 2015 to April 2016. Analyses of qualitative morphological characters followed the descriptors list for sesame. In general, a representative assessment of qualitative traits in M4 lines will be followed by the offspring of M5. Dendrogram showed that the 57 mutant lines categorized into two major clusters. Cluster I were composed of two sub-clusters, consisting 17 and 31 lines. This sub-cluster was the largest part of the genotype distribution. Cluster II composed of 9 lines, where M4 were the majority. The correlation value between characters ranged from 0.7176 up to 1.0. Morphological diversity among lines were largely influenced by genetic rather than environmental factors. This study supports the selection of lines based on phenotype stability. Evaluation of the structural diversity of mutant-sesame populations could be applied in sesame-breeding programs.</p>

Morphological evidence for paraphyly of Holopothrips Hood (Thysanoptera: Phlaeothripidae), a Neotropical genus of gall-inducing thrips

2021 ◽  
pp. 1-24
Author(s):  
Mariana F. Lindner ◽  
Augusto Ferrari ◽  
Adriano Cavalleri
Keyword(s):  
Phylogenetic Analysis ◽  
Host Plants ◽  
Morphological Diversity ◽  
Morphological Characters ◽  
Bootstrap Support ◽  
Morphological Evidence ◽  
Diverse Group ◽  
The Matrix ◽  
Internal Relations ◽  
Evolutionary Story

Abstract Holopothrips is a diverse group of thrips associated to galls in the Neotropics, with a variety of host plants and wide morphological diversity. Relationships to other Neotropical groups have been proposed, but are still untested, and the monophyly of the genus remains doubtful. Here, we perform a phylogenetic analysis of Holopothrips, based on morphological characters. A total of 87 species were included in the matrix and eight analyses were carried out, but all of them failed to recover Holopothrips as a monophyletic grouping. Bremer and Bootstrap support values were low, and the topologies varied among all analyses, with uncertain internal relations for the ingroup. These results indicate that the relationships for Holopothrips species, and the proposed related genera, are more complex than previously reported; and morphological characters may not be enough to recover the evolutionary story within this group. We also discuss the influences of different character coding, continuous characters and weighting schemes in our results.

Predicting Future Diameter Distributions Given Current Stand Attributes

2022 ◽  
Author(s):  
Quang V. Cao
Keyword(s):  
Prediction Method ◽  
Diameter Distribution ◽  
Tree Level ◽  
Individual Tree ◽  
Distribution Parameters ◽  
Level Model ◽  
Novel Method ◽  
Quadratic Mean Diameter ◽  
Stand Attributes ◽  
Individual Trees

This study discussed four methods to project a diameter distribution from age A1 to age A2. Method 1 recovers parameters of the distribution at age A2 from stand attributes at that age. Method 2 uses a stand-level model to grow the quadratic mean diameter, and then recovers the distribution parameters from that prediction. Method 3 grows the diameter distribution by assuming tree-level survival and diameter growth functions. Method 4 first converts the diameter distribution at age A1 into a list of individual trees before growing these trees to age A2. In a numerical example employing the Weibull distribution, methods 3 and 4 produced better results based on two types of error indices and the relative predictive error for each diameter class. Method 4 is a novel method that converts a diameter distribution into a list of individual-trees, and in the process, successfully links together diameter distribution, individual-tree, and whole stand models.

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