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295 results for “tropical dry forest”
Fig. 2 in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 2. Croton sertanejus Sodré & M.J.Silva sp. nov. A–B. Habit. C. Flowering branch showing ramifying in alternate branches. D. Inflorescence showing pistillate flowers and staminate buds. E. Pistillate flowers. F. Unisexual staminate inflorescence. G. Fruit. H–I. Fruit columella. J. Apex of columella with irregular and plane tips. K. Seed, dorsal side. L. Seed, ventral surface. A–F = Population from Oliveira dos Brejinhos, Bahia (R.C. Sodré et al. 3350, holotype; BOTU); G–L = K.N.C. Castro & J.B.A. Souza 471 (CEN). Photographs: R.C. Sodré.
Fig. 7 in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 7. Cross sections of the petiole of Croton echioides Baill. and C. sertanejus Sodré & M.J.Silva sp. nov. A–E. Croton echioides. A. Median portion of the petiole. B. Detail of accessory vascular bundles. C. Detail of the epidermis, cortex and vascular cylinder. D–E. Detail of vascular cylinder, laticifers, gelatinous fibers and druses. – F–J. C. sertanejus sp. nov. F. Median portion of the petiole. G. Detail of accessory vascular bundles. H. Detail of the epidermis and cortex. I–J. Detail of vascular cylinder, gelatinous fibers and druses. Asterisks indicate laticifers. Abbreviations: av = accessory vascular bundles; cl = collenchyma; co = cortex; d = druses; ep = epidermis; f = gelatinous fibers; p = pericycle; pa = ground parenchyma; ph = phloem; pi = pith; stt = stellate trichome; vc = vascular cylinder; xy = xylem. A–E = R.C. Sodré et al. 3284 (BOTU); F–J = R.C. Sodré et al. 3350, holotype (BOTU). Scale bars: A, F = 300 µm; B–D, G–H, J = 50 µm; C = 200 µm; E, I = 20 µm.
Fig. 3 in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 3. Geographical distribution of Croton echioides Baill. and C. sertanejus Sodré & M.J.Silva sp. nov. Ecoregions classified according to Dinerstein et al. (2017) (avaliable athttps://ecoregions2017.appspot.com). Abbreviations for Brazilian States: AL = Alagoas; BA = Bahia; CE = Ceará; ES = Espirito Santo; DF = Federal District; GO = Goiás; MA = Maranhão; MG = Minas Gerais; PB = Paraíba; PE = Pernambuco; PI = Piauí; RJ = Rio de Janeiro; RN = Rio Grande do Norte; SE = Sergipe; SP = São Paulo; TO = Tocantins.
Fig. 5. Croton echioides Baill. A–B. Habit. C. Flowering branch. D in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 5. Croton echioides Baill. A–B. Habit. C. Flowering branch. D. Inflorescence showing pistillate flowers and staminate buds, detail of the pistillate flowers in the insert. E. Pistillate flowers. F. Median portion of an inflorescence with bisexual cymules containing one pistillate flower and one staminate bud. G. Detail of the staminate inflorescence. H. Staminate flowers. I. Staminate flowers and buds. J. Fruit. K. Fruit columella. L. Apex of columella with three slightly ascending tips. M. Seed, dorsal side. N. Seed, ventral side. A, F–I. = Population from Igaporã, Bahia (R.C. Sodré et al. 3284; BOTU); B–E. = Population from Abaíra, Bahia (R.C. Sodré et al. 3314; BOTU); J–N. = V.C. Souza et al. 5495 (ESA). Photographs: R.C. Sodré.
Fig. 6 in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 6. Cross sections of the leaf blade of C. echioides Baill. (A, E–I, N–Q) and C. sertanejus Sodré & M.J.Silva sp. nov. (B–D, J–M, R–V). A. Median portion of the leaf blade of C. echioides, note the stipitate trichomes of abaxial surface in lateral view. B. Median portion of the leaf blade of C. sertanejus, note the sessile trichomes of abaxial surface in lateral view. C. Leaf margin of C. sertanejus, note simple trichomes of adaxial surface. D. Base of the trichome of adaxial surface of C. sertanejus. E. Vascular bundle of C. echioides. F–H. Median portion of the leaf blade of C. echioides. I. Leaf margin of C. echioides. J. Vascular bundle of C. sertanejus. K–L. Median portion of the leaf blade of C. sertanejus. M. Leaf margin of C. sertanejus. N. Primary vein of C. echioides. O. Detail of vascular cylinder of C. echioides primary vein. P. Collenchyma in adaxial surface of C. echioides primary vein. Q. Detail of the vascular bundle, note xylem, phloem, laticifer and druse. R. Primary vein of C. sertanejus. S. Detail of vascular cylinder of C. sertanejus primary vein. T. Collenchyma in adaxial surface of C. echioides primary vein. U. Detail of the epidermis and cortex of C. echioides primary vein. V. Detail of the vascular bundle, note xylem, phloem and druse. Arrowheads indicate stomata; asterisks indicate laticifers. Abbreviations: cl = collenchyma; co = cortex; d = druses; ep = epidermis; i = idioblasts; pa = ground parenchyma; ph = phloem; pp = palisade parenchyma; sp = spongy parenchyma; st = simple trichome; stt = stellate trichome; vb = vascular bundle; vc = vascular cylinder; xy = xylem. A, E–I, N–Q = R.C. Sodré et al. 3284 (BOTU); B–D, J–M, R–V = R.C. Sodré et al. 3350, holotype (BOTU). Scale bars: A–C, N, R = 200 µm; D–G, I–M, P–Q, T–V = 50 µm; H = 20 µm; O, S = 100 µm.
Fig. 1 in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 1. Croton sertanejus Sodré & M.J.Silva sp. nov. A. Flowering branch. B. Detail of older portion of stem with leaf scars. C 1 –C 2. Indumentum of the stems. C 1. Tomentose indumentum. C 2. Hirsute indumentum. D 1 –D 3. Trichomes of the stems. D 1. Stellate trichome. D 2. Multiradiate-porrect trichome. D 3. Stellate-porrect trichome. E. Stipule, ventral surface. F 1 –F 2. Leaves. F 1. Elliptic leaf blade. F 2. Ovate leaf blade. G. Detail of the galls on the leaf blade. H. Extrafloral nectaries of leaf base in adaxial view. I. Colleters of leaf margin in adaxial view. J1–J3. Indumentum of leaf blades. J1. Tomentose indumentum of abaxial surface. J2. Sparse indumentum of simple, stellate-porrect or 2-radiate trichomes of adaxial surface. J 3. Sparse indumentum of stellate trichomes of adaxial surface. K. Inflorescence. L 1. Staminate flower bract, ventral surface. L 2. Staminate flower bracteole, ventral surface. M. Staminate flower. N 1 – N 3. Lobes of staminate flower calyx in dorsal view. N 1. Two lobes showing the union of the calyx. N 2. Dense indumentum of stellate-porrect trichomes. N3. Sparse indumentum of stellate-porrect trichomes. O 1 –O 2. Pistillate flower petals in dorsal view. O 1. Obovate petal. O 2. Oblanceolate petal. P. Stamen. Q 1. Pistillate flower bract, ventral surface. Q 2. Pistillate flower bracteole, ventral surface. R. Pistillate flower. S 1 –S 2. Pistillate flower sepal. S 1. Dorsal view. S 2. Ventral view. T. Gynoecium. U. Nectary disk and reduced petals of the pistillate flowers (cut out sepals and gynoecium removed). V. Fruit. W 1. Fruit columella. W2. Apex of columella with irregular and plane tips. W3. Apex of columella with three slightly ascending tips. X 1. Seed, dorsal side. X2. Seed, ventral side. Drawing by Renato Galhardo: A–U = R.C. Sodré et al. 3350, holotype (BOTU); V–X = K.N.C. Castro & J.B.A. Souza 471 (CEN).
Fig. 4. Croton echioides Baill. A. Flowering branch. B in Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)
Fig. 4. Croton echioides Baill. A. Flowering branch. B. Detail of the indumentum of the stems and stipule. C 1 –C 2. Trichomes of the stems. C 1. Stellate-rotate trichome. C 2. Stellate-porrect trichome. D 1 –D 2. Stipules. D1. Surface. D 2. Ventral surface. E 1–E3. Leaves, note the variation in the shape of the leaf blades and in the length of the petioles. F1–F3. Extrafloral nectaries of leaf base in abaxial view. F1. Stipitatepatelliform. F 2. Obconic. F 3. Cylindric. G. Colleters of leaf margin in adaxial view. H 1. Leaf indumentum of the abaxial surface. H 2. Leaf indumentum of the adaxial surface. I. Inflorescence. J 1. Staminate flower bract, ventral surface. J 2. Staminate flower bracteole, ventral surface. K. Staminate flower. L 1 –L 2. Lobes of staminate flower calyces in dorsal view. L1. Dense indumentum. L2. Sparse indumentum. M1–M2. Staminate flower petals in dorsal view. M1. Obovate petal. M2. Oboval-oblanceolate petal. N. Stamen. O 1. Pistillate flower bract, ventral surface. O 2 –O 3. Pistillate flower bracteoles, ventral surface. P. Pistillate flower. Q. Pistillate flower in upper view showing ventral surface of the sepals, disk and reduced petals (gynoecium removed), note the unequal sepals. R 1 –R 2. Indumentum of ventral surface of the pistillate flower sepals. S. Pistillate flower in lower view showing dorsal surface of sepals. T. Indumentum of dorsal surface of the pistillate flower sepals. U. Gynoecium. V. Nectary disk and reduced petals of the pistillate flowers (cut out sepals and gynoecium removed). W. Fruit. X 1. Fruit columella. X 2. Apex of columella with plane tips. X 3. Apex of columella with three slightly ascending tips. Y 1. Seed, dorsal side. Y 2. Seed, ventral side. Drawing by Renato Galhardo: A, E2, F1 = E. Melo et al. 7571 (HUEFS); E1, F3, O1–V = R.C. Sodré et al. 3284 (BOTU); B–D2, G–N = R.C. Sodré et al. 3314 (BOTU); E3, F2, W–Y2 = V.C. Souza et al. 5495 (ESA).
FIGURE 1 in Ectoparasitic flies (Diptera, Streblidae) on bats (Mammalia, Chiroptera) in a dry tropical forest in the northern Colombia
FIGURE 1: Study sites of host-ectoparasite relationship between Streblidae and bats in Colombia. Darker areas correspond to higher altitudes.
Figure 1 in Direct seeding as a recruitment alternative for the threatened tropical palm Syagrus coronata (Mart.) Beccari in Brazilian dry forest
Figure 1. Effects of habitat and defleshing treatments on the seed fate of Syagrus coronata after 240 days during two years of experiment.
Linked collectors and determiners for: Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae).
Natural history specimen data linked to collectors and determiners held within, "Croton sertanejus, a new species from Seasonally Dry Tropical Forest in Brazil, and redescription of C. echioides (Euphorbiaceae)". Claims or attributions were made on Bionomia by volunteer Scribes, <a href="https://bionomia.net/dataset/95293339-8775-4667-aa17-7639808b7a7d">https://bionomia.net/dataset/95293339-8775-4667-aa17-7639808b7a7d</a> using specimen data from the dataset aggregated by the Global Biodiversity Information Facility, <a href="https://gbif.org/dataset/95293339-8775-4667-aa17-7639808b7a7d">https://gbif.org/dataset/95293339-8775-4667-aa17-7639808b7a7d</a>. Formatted as a Frictionless Data package.
Fig. 1 in Secondary removal of seeds dispersed by gibbons (Hylobates lar) in a tropical dry forest in Thailand
Fig. 1. Distribution of experimental sites where seeds were dispersed by 4 groups of white-handed gibbons (Hylobates lar). Home range maps of the gibbons are based on Light (2016) and Phiphatsuwannachai et al. (2018), plus newly-discovered areas (extended home ranges) by the author. Fruiting trees and gibbon defecation locations were recorded in a GPS. Each site when active contained a camera trap and a paired control/treatment.
Fig 2 in Secondary removal of seeds dispersed by gibbons (Hylobates lar) in a tropical dry forest in Thailand
Fig 2. Estimates of beta-coefficients from binomial regressions with parameter estimates derived from model averaging with 95% confidence intervals. A variable is considered significant if the confidence interval does not overlap zero.
Tropical cyclones facilitate recovery of forest leaf area from dry spells in East Asia
<p>This online repository copies the source code and the download link of the input data for the research work of analyzing forest leaf area change due to the TC activities in the west pacific ocean basin. </p> <p><strong>TC Track data, mask, climate reanalysis, leaf area, ERA5 (wind speed, surface pressure data), and SPEI dataset: </strong></p> <p><a href="http://YYCdb.synology.me:5833/sharing/YizTR8HPR">http://YYCdb.synology.me:5833/sharing/YizTR8HPR</a></p> <p>password:bg-2022-115</p> <p>File size: 373G</p> <p><strong>The path for downloading the source code/script for analyzing the LAI changes:</strong></p> <p><a href="http://YYCdb.synology.me:5833/sharing/JC2AGt9Kh">http://YYCdb.synology.me:5833/sharing/JC2AGt9Kh</a></p> <p>password:bg-2022-115</p> <p>File size: 880M</p> <p><strong>Data table for all events used in this study:</strong></p> <p><a href="http://YYCdb.synology.me:5833/sharing/MqA4YFBHk">http://YYCdb.synology.me:5833/sharing/MqA4YFBHk</a></p> <p>password:bg-2022-115</p> <p>Filesize:824K</p>
The relationship between plant diversity and facilitation during tropical dry forest restoration
<p>Restoration programs that promote the functioning of restored ecosystems are in urgent demand. Although several biodiversity and ecosystem functioning (BEF) experiments have demonstrated the importance of functional complementarity enhancing plant community performance, no BEF study has yet experimentally manipulated facilitation testing its contribution to how the complementarity effect modulates community performance.</p> <p>We built a restoration experiment manipulating diversity and facilitation in a tropical semiarid forest. We planted 4704 seedlings of 16 native tree species to assemble 147 experimental communities with 45 different compositions comprising 1, 2, 4, 8 or 16 species. Facilitation was included in the experimental design by creating a gradient of communities from low to high facilitation potential (based on prior research). We measured functional diversity and functional identity using species above and below-ground traits to investigate how they modulate the effects of species diversity and facilitation on leaf biomass production, and its additive partition biodiversity effects (NE, CE & SE).</p> <p>The joint influence of diversity and facilitation was tested separately for leaf biomass production and Net Biodiversity Effect using Linear Mixed Models (LMMs). We subsequently ran LMMs including functional diversity and functional identity. We hypothesised that facilitation would increase community productivity and functioning and that functional dispersion and functional identity related to above and below-ground traits would explain facilitation performance.</p> <p>Facilitation positively influenced leaf biomass production as predicted, but unexpectedly, neither of the functional traits were important for modulating the facilitation process. Positive values for Complementarity Effect (CE) showed that plants performed better in mixtures in comparison to monocultures. Selection Effect (SE) negative values, showed that species with below-average performance in monocultures, performed better in mixtures. Unexpectedly, CE did not increase as species diversity or facilitation increased. SE was influenced negatively by facilitation leading to a more equal distribution of biomass production between species in mixtures.</p> <p>Synthesis: Facilitation improves biomass production in restored communities and increases biomass equitability among plant species and thus ecosystem reliability. To improve restoration success, plant communities should be built using facilitating plants.</p>
Seed dispersal syndrome predicts ethanol concentration of fruits in a tropical dry forest
<p><span>Studying fruit traits and their interactions with seed dispersers can improve how we interpret patterns of biodiversity, ecosystem function, and evolution. Mounting evidence suggests that fruit ethanol is common, variable, and may exert selective pressures on seed dispersers. To test this, we comprehensively assess fruit ethanol content in a wild ecosystem and explore sources of variation. We hypothesise that both phylogeny and seed dispersal syndrome explain variation in ethanol levels, and we predict that fruits with mammalian dispersal traits will contain higher levels of ethanol than those with bird dispersal traits. We measured ripe fruit ethanol content in species with mammal- (n = 16), bird- (n = 14), or mixed-dispersal (n = 7) syndromes in a Costa Rican tropical dry forest. Seventy-eight percent of fruit species yielded measurable ethanol concentrations. We detected a phylogenetic signal in maximum ethanol levels (Pagel's λ = 0.82). Controlling for phylogeny, we observed greater ethanol concentrations in mammal-dispersed fruits, indicating that dispersal syndrome helps explain variation in ethanol content and that mammals may be more exposed to ethanol in their diets than birds. Our findings further our understanding of wild fruit ethanol and its potential role as a selective pressure on frugivore sensory systems and metabolism.</span></p>
FIG. 3 in New species of lichen for Colombia tropical dry forest
FIG. 3. — Pyrenula gigaspora Soto-Medina, Aptroot & Lücking, sp. nov.: A, habitus; B, ascospores. Scale bars: A, 10 mm; B, 20 μm.
FIG. 2 in New species of lichen for Colombia tropical dry forest
FIG. 2. — Ocellularia vallensis Soto-Medina & Lücking, sp. nov.: A, habitus; B, C, ascospores. Scale bars: A, 10 mm; B, C, 10 μm.
FIG. 1 in New species of lichen for Colombia tropical dry forest
FIG. 1. — Astrothelium caucavallense Soto-Medina & Aptroot, sp. nov.: A, habitus; B, ascospores. Scale bars: A, 10 mm; B, 10 μm.
Improved household living standards can restore dry tropical forests
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The relationship between plant diversity and facilitation during tropical dry forest restoration
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Allen Brain Atlas
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OpenNeuro
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