Morphological divergence among Spanish Common Crossbill populations and adaptations to different pine species

Ibis ◽  
2020 ◽  
Vol 162 (4) ◽  
pp. 1279-1291
Author(s):  
Daniel Alonso ◽  
Blanca Fernández-Eslava ◽  
Pim Edelaar ◽  
Juan Arizaga
Keyword(s):  
Morphological Divergence ◽  
Common Crossbill ◽  
Pine Species

Red Heart Disease in Pines Caused by Porodaedalea (Phellinus) pini in Florida

EDIS ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 3
Author(s):  
Yin-Tse Huang ◽  
Jeffrey Eickwort ◽  
Jiri Hulcr
Keyword(s):  
Heart Disease ◽  
Forest Resources ◽  
Fact Sheet ◽  
Cavity Nesting ◽  
Pine Species

All pine species in Florida are susceptible to red heart disease. The disease can decrease timber value and weaken trees, making them threats to people and property. In forests, however, the same disease can be beneficial to cavity-nesting animals like red-cockaded woodpeckers. This 3-page fact sheet written by Yin-Tse Huang, Jeffrey Eickwort, and Jiri Hulcr and published by the UF/IFAS School of Forest Resources and Conservation describes the disease and provides some tips to manage it in areas where it could cause problems for people.http://edis.ifas.ufl.edu/fr425

Redescription and relationships of Pseudothilmanus Pic (Coleoptera: Rhagophthalmidae)—a long-term neglected glow-worm beetle genus from the Himalayas

Zootaxa ◽  
2011 ◽  
Vol 2794 (1) ◽  
pp. 57 ◽  
Author(s):  
ROBIN KUNDRATA ◽  
LADISLAV BOCAK
Keyword(s):  
Morphological Divergence ◽  
Diagnostic Characters ◽  
The Family

Pseudothilmanus Pic, 1918 is redescribed and two species, P. alatus Pic, 1918 and P. marginatus Pic, 1918, are placed in the genus. The subgenus Drilothilmanus Pic, 1918 is synonymized with the nominotypical genus on the basis of low morphological divergence and redundancy in classification. Pseudothilmanus is newly classified in the family Rhagophthalmidae, in contrast to the original placement in Drilidae. Diagnostic characters for Pseudothilmanus and both species placed within the genus are illustrated.

Spatio-temporal approach for identification of critical conservation areas: a case study with two pine species from a threatened temperate forest in Mexico

2019 ◽  
Vol 28 (7) ◽  
pp. 1863-1883 ◽  
Author(s):  
Agustín Molina Sánchez ◽  
Patricia Delgado ◽  
Antonio González-Rodríguez ◽  
Clementina González ◽  
A. Francisco Gómez-Tagle Rojas ◽  
...  
Keyword(s):  
Temperate Forest ◽  
Conservation Areas ◽  
Spatio Temporal ◽  
Pine Species

scholarly journals A uni- and multivariate analysis approach to reveal sexual size dimorphism in Iranian populations of Hypera postica (Coleoptera: Curculionidae)

Biologia ◽  
2015 ◽  
Vol 70 (9) ◽  
pp. 1228-1233 ◽  
Author(s):  
Ehsan Sanaei ◽  
Marjan Seiedy ◽  
Farzaneh Momtazi
Keyword(s):  
Body Size ◽  
Sexual Size Dimorphism ◽  
Egg Laying ◽  
Morphological Divergence ◽  
High Fecundity ◽  
Hypera Postica ◽  
Size Dimorphism ◽  
Female Body Size ◽  
Divergence Pattern ◽  
Iranian Populations

Abstract Body size dimorphism between genders is a commonly observed phenomenon in insects, usually manifested in larger female body size. Sexual Size Dimorphism (SSD) varies from species to species, the degree and direction influenced by certain evolutionary pressures. Intraspecific variation in SSD may also occur between populations. The Hypera postica (Gyllenhal, 1813) is a well-known alfalfa plant pest that shows a degree of morphological divergence in its populations. The female alfalfa weevils are very fecund and have a larger body size compared to males. To improve our knowledge on magnitude and direction of SSD in alfalfa weevil, we studied 200 specimens of H. postica from four Iranian populations (Karaj1, Karaj2, Tuyserkan and Jovein). 10 morphological variables from three external anatomic parts (pronotum, elytra and rostrum) and 45 ratio characters were statistically analyzed in order to determine the amount of SSD in Iranian populations. In addition we investigated for morphological divergence pattern in mentioned populations. The results of this study show that a low degree of morphological divergence occurs in Iranian populations. Measured variables indicate that the SSD pattern of H. postica is compatible with the Rensch’s rule, and is related to high fecundity of females and a lack of strong sexual selection. Also it is mentioned that the larger rostrum in females may correspond to its unique role in egg laying.

scholarly journals Stand-level biomass models for predicting C stock for the main Spanish pine species

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ana Aguirre ◽  
Miren del Río ◽  
Ricardo Ruiz-Peinado ◽  
Sonia Condés
Keyword(s):  
Form Factor ◽  
Pinus Halepensis ◽  
Dry Weight ◽  
Pinus Nigra ◽  
Carbon Stocks ◽  
Tree Size ◽  
Pine Forests ◽  
Stand Volume ◽  
Biomass Models ◽  
Pine Species

Abstract Background National and international institutions periodically demand information on forest indicators that are used for global reporting. Among other aspects, the carbon accumulated in the biomass of forest species must be reported. For this purpose, one of the main sources of data is the National Forest Inventory (NFI), which together with statistical empirical approaches and updating procedures can even allow annual estimates of the requested indicators. Methods Stand level biomass models, relating the dry weight of the biomass with the stand volume were developed for the five main pine species in the Iberian Peninsula (Pinus sylvestris, Pinus pinea, Pinus halepensis, Pinus nigra and Pinus pinaster). The dependence of the model on aridity and/or mean tree size was explored, as well as the importance of including the stand form factor to correct model bias. Furthermore, the capability of the models to estimate forest carbon stocks, updated for a given year, was also analysed. Results The strong relationship between stand dry weight biomass and stand volume was modulated by the mean tree size, although the effect varied among the five pine species. Site humidity, measured using the Martonne aridity index, increased the biomass for a given volume in the cases of Pinus sylvestris, Pinus halepensis and Pinus nigra. Models that consider both mean tree size and stand form factor were more accurate and less biased than those that do not. The models developed allow carbon stocks in the main Iberian Peninsula pine forests to be estimated at stand level with biases of less than 0.2 Mg∙ha− 1. Conclusions The results of this study reveal the importance of considering variables related with environmental conditions and stand structure when developing stand dry weight biomass models. The described methodology together with the models developed provide a precise tool that can be used for quantifying biomass and carbon stored in the Spanish pine forests in specific years when no field data are available.

scholarly journals Constitutive Chemical Compounds in Different Tissues of Seven Pine Species and Their Relationship with Susceptibility to Pine Wood Nematode (Bursaphelenchus xylophilus)

2020 ◽  
Vol 3 (1) ◽  
pp. 68
Author(s):  
Margarita Alonso Santos ◽  
María Menéndez-Gutiérrez ◽  
Raquel Díaz Vazquez
Keyword(s):  
Condensed Tannin ◽  
Pine Wilt Disease ◽  
Interspecific Variation ◽  
Bursaphelenchus Xylophilus ◽  
Soluble Carbohydrates ◽  
Total Polyphenols ◽  
North West ◽  
Calcium Iron ◽  
Susceptible Group ◽  
Pine Species

Pine wilt disease was detected in Galicia (North West of Spain) in 2010. Two-year-old seedlings of seven pine species were inoculated with B. xylophilus, and three different groups were stablished: non-susceptible (P. canariensis, P. taeda, P. halepensis, and P. pinea); susceptible (P. pinaster, P. radiata), and highly-susceptible (P. sylvestris). We aimed to determine the interspecific variation of constitutive compounds levels, groups and species, and their relationships with nematode multiplication and mortality. Needles of the non-susceptible group had significantly less water and more nitrogen, potassium, iron, and starch than the others groups; the cortex and phloem of the non-susceptible group had more nitrogen, phosphorus, manganese, and starch, and less potassium, calcium, iron, total polyphenols, condensed tannins and liposoluble substances than the highly susceptible group. The xylem of the non-susceptible group had more N, P, Mg, Mn, total polyphenols, and starch than the other groups. Higher levels of constitutive N and/or starch in any tissue was related with less mortality and nematode multiplication; higher P in the three tissues was also correlated with less nematode multiplication. Moreover, liposoluble substances, soluble carbohydrates and condensed tannin concentration in the needles were negatively correlated with nematode multiplication. On the contrary, in the needles, water content and K were positively correlated with mortality and nematode invasion.

scholarly journals Effects of predation pressure and resource use on morphological divergence in omnivorous prey fish

2013 ◽  
Vol 13 (1) ◽  
pp. 132 ◽  
Author(s):  
Kristin Scharnweber ◽  
Kozo Watanabe ◽  
Jari Syväranta ◽  
Thomas Wanke ◽  
Michael T Monaghan ◽  
...  
Keyword(s):  
Resource Use ◽  
Predation Pressure ◽  
Morphological Divergence ◽  
Prey Fish

Response of the antioxidant system of light-demanding and shade-bearing pine species to phytocenotic stress

2013 ◽  
Vol 6 (2) ◽  
pp. 149-155 ◽  
Author(s):  
I. L. Milyutina ◽  
N. E. Sudachkova ◽  
L. I. Romanova
Keyword(s):  
Antioxidant System ◽  
Pine Species

Morphological Divergence in Endemic Gastropods from Lake Tanganyika: Implications for Models of Species Flock Formation

Palaios ◽  
1987 ◽  
Vol 2 (5) ◽  
pp. 413 ◽  
Author(s):  
Mark R. Johnston ◽  
Andrew S. Cohen
Keyword(s):  
Lake Tanganyika ◽  
Species Flock ◽  
Morphological Divergence

Pattern of height growth for southern pine species

1999 ◽  
Vol 118 (1-3) ◽  
pp. 183-196 ◽  
Author(s):  
Boris Zeide
Keyword(s):  
Height Growth ◽  
Southern Pine ◽  
Pine Species
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