scholarly journals The implementation of assisted migrationin Canadian forests

2011 ◽  
Vol 87 (06) ◽  
pp. 766-777 ◽  
Author(s):  
John Pedlar ◽  
Daniel McKenney ◽  
Jean Beaulieu ◽  
Stephen Colombo ◽  
Jason McLachlan ◽  
...  
Keyword(s):  
Tree Species ◽  
Plantation Establishment ◽  
Assisted Migration ◽  
Forest Species ◽  
Seed Transfer ◽  
Species Of Conservation Concern ◽  
Provenance Trials ◽  
Conservation Concern ◽  
Seed Transfer Guidelines

We outline the major steps involved in implementing assisted migration (AM) and assess, in a general way, the capacity to carry out each step in Canadian forests. Our findings highlight the fact that capacity to implement AM differs between forest species; in particular, the existence of established provenance trials, seed transfer guidelines, seed procurement systems, and plantation establishment protocols makes AM considerably more feasible for most commercial tree species than for most species of conservation concern. We report on several AM efforts involving commercial tree species that are already underway in Canada and identify a number of initiatives that could be undertaken to help build AM capacity. This paper is not intended as an endorsement of the AM approach; however, we feel there is considerable value in discussing implementation issues at this point in the AM debate.

Climatic Variables Differentially Influence Neotropical Plant Species of Conservation Concern

2021 ◽  
pp. 1-16
Author(s):  
Pablo Antúnez ◽  
Christian Wehenkel ◽  
Collins Byobona Kukunda ◽  
José Ciro Hernández-Díaz
Keyword(s):  
Plant Species ◽  
Climatic Variables ◽  
Species Of Conservation Concern ◽  
Conservation Concern

Using impact assessment study designs for addressing impacts to species of conservation concern

2012 ◽  
Vol 36 (3) ◽  
pp. 450-456 ◽  
Author(s):  
Mike E. Marshall ◽  
Ashley M. Long ◽  
Shannon L. Farrell ◽  
Heather A. Mathewson ◽  
Michael L. Morrison ◽  
...  
Keyword(s):  
Impact Assessment ◽  
Impact Assessment Study ◽  
Assessment Study ◽  
Species Of Conservation Concern ◽  
Conservation Concern ◽  
Study Designs

scholarly journals White-nose syndrome-related changes to Mid-Atlantic bat communities across an urban-to-rural gradient

BMC Zoology ◽  
2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Sabrina Deeley ◽  
Joshua B. Johnson ◽  
W. Mark Ford ◽  
J. Edward Gates
Keyword(s):  
The United States ◽  
Myotis Lucifugus ◽  
National Capital Region ◽  
Conservation Areas ◽  
White Nose Syndrome ◽  
Species Of Conservation Concern ◽  
National Capital ◽  
Park Service ◽  
Bat Conservation ◽  
Conservation Concern

Abstract Background White-nose Syndrome (WNS) has reduced the abundance of many bat species within the United States’ Mid-Atlantic region. To determine changes within the National Park Service National Capital Region (NCR) bat communities, we surveyed the area with mist netting and active acoustic sampling (2016–2018) and compared findings to pre-WNS (2003–2004) data. Results The results indicated the continued presence of the threatened Myotis septentrionalis (Northern Long-eared bat) and species of conservation concern, including Perimyotis subflavus (Tri-colored bat), Myotis leibii (Eastern Small-footed bat) and Myotis lucifugus (Little Brown bat). However, we documented a significant reduction in the abundance and distribution of M. lucifugus and P. subflavus, a decrease in the distribution of M. septentrionalis, and an increase in the abundance of Eptesicus fuscus (Big Brown bat). Conclusions Documented post-WNS M. septentrionalis recruitment suggests that portions of the NCR may be important bat conservation areas. Decreases in distribution and abundance of P. subflavus and M. lucifugus indicate probable extirpation from many previously occupied portions of the region.

scholarly journals Deep genetic structure at a small spatial scale in the endangered land snail Xerocrassa montserratensis

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Cristina Català ◽  
Vicenç Bros ◽  
Xavier Castelltort ◽  
Xavier Santos ◽  
Marta Pascual
Keyword(s):  
Genetic Structure ◽  
Land Snail ◽  
Snail Species ◽  
Small Spatial Scale ◽  
Geographic Ranges ◽  
Genetic Groups ◽  
Species Of Conservation Concern ◽  
Conservation Actions ◽  
Conservation Concern ◽  
Single Locality

AbstractSpecies with small geographic ranges do not tend to have a high genetic structure, but some land snail species seem to be an exception. Xerocrassa montserratensis, an endangered land snail endemic to Catalonia (northeastern Iberian Peninsula), is an excellent model to study the processes affecting the phylogeography of specialized species of conservation concern. This species is restricted to xerophilous stony slopes and occurs within a small and fragmented area of ca. 500 km2. We sequenced the COI barcode region of 152 individuals from eight sites covering the entire range of the species. We found four genetic groups mostly coincident with their geographic distribution: a central ancestral group containing shared haplotypes among five localities and three groups restricted to a single locality each. Two of these derived groups were geographically and genetically isolated, while the third and most differentiated group was not geographically isolated. Geomorphologic and paleoclimatic processes during the Pleistocene can explain the divergence found between populations of this low dispersal species with historical fragmentation and secondary contacts. Nonetheless, recent passive large dispersal through streams was also detected in the central group. Overall, our study uncovered four evolutionary units, partially matching morphologically described subspecies, which should be considered in future conservation actions.

Integrating citizen science and remotely sensed data to help inform time-sensitive policy decisions for species of conservation concern

2019 ◽  
Vol 237 ◽  
pp. 463-469 ◽  
Author(s):  
Ashley M. Long ◽  
Brian L. Pierce ◽  
Amanda D. Anderson ◽  
Kevin L. Skow ◽  
Addie Smith ◽  
...  
Keyword(s):  
Citizen Science ◽  
Remotely Sensed ◽  
Policy Decisions ◽  
Remotely Sensed Data ◽  
Species Of Conservation Concern ◽  
Conservation Concern

scholarly journals GROWTH AND PHYSIOLOGICAL RESPONSES OF TREE SPECIES (Hymenaea courbaril L., Peltophorum dubium (Spreng.) Taub. and Myroxylon peruiferum L. F.) EXPOSED TO DIFFERENT COPPER CONCENTRATIONS IN THE SOIL

2018 ◽  
Vol 42 (2) ◽  
Author(s):  
Daniele Maria Marques ◽  
Adriano Bortolotti Silva ◽  
José Ricardo Mantovani ◽  
Dalvana Sousa Pereira ◽  
Thiago Corrêa Souza
Keyword(s):  
Antioxidant Enzymes ◽  
Tree Species ◽  
Copper Content ◽  
Metal Tolerance ◽  
Physiological Responses ◽  
Forest Species ◽  
Hymenaea Courbaril ◽  
Tolerance Strategy ◽  
Photosynthetic Machinery ◽  
Biometric Measurements

ABSTRACT Copper (Cu) is an essential micronutrient for plants. However, when in excess, it becomes phytotoxic. In this context, the objective of this study was to evaluate the growth and physiological responses of tree species exposed to different copper concentrations in the soil. Three experiments were carried out, one for each forest species under study: Myroxylon peruiferum ("Óleo Bálsamo"), Hymenaea courbaril ("Jatobá") and Peltophorum dubium ("Canafístula"), with the same doses of copper (0, 50, 100, 200 and 400 mg kg-1). The experimental design was in randomized blocks (DBC), with five copper concentrations and four replicates. The plants were grown on soil substrate packed in 8-dm3 pots and kept in a greenhouse for 90 days. Biometric measurements, chlorophyll, antioxidant enzymes and copper content in tissues were evaluated. Copper did not influence the vegetative growth of the species studied. The content of chlorophyll "a" was reduced with increasing copper concentrations in the soil. H. courbaril had 56 to 92% copper retained in the roots, and the same behavior was observed for P. dubium (77-91%) and M. peruiferum (19-64%). In the three species studied, there was copper bioaccumulation, mainly in the roots, possibly as a metal tolerance strategy, preserving the most active tissues and the photosynthetic machinery. Cu translocation from roots to shoot was very restricted in all species. This behavior, associated with the increase in the activity of some antioxidant enzymes in plants, may indicate the phytoremediation potential of the studied species.

scholarly journals Using a capture-recapture approach for modelling the detectability and distribution of Houbara Bustard in southern Tunisia

2011 ◽  
Vol 22 (3) ◽  
pp. 288-298 ◽  
Author(s):  
M. CHAMMEM ◽  
S. SELMI ◽  
T. KHORCHANI ◽  
S. NOUIRA
Keyword(s):  
Regression Analyses ◽  
Species Occurrence ◽  
Imperfect Detection ◽  
Southern Tunisia ◽  
Species Of Conservation Concern ◽  
Habitat Factors ◽  
Houbara Bustard ◽  
Capture Recapture ◽  
Conservation Concern ◽  
Free Ranging

SummaryModelling the distribution of species of conservation concern is an important issue in population ecology. Classically, logistic regression analyses are conducted to estimate species’ distributions from detection/non-detection data in a sample of sites and to test for the significance of several environmental variables in predicting the probability of occurrence. These modelling approaches assume that species detection probability is constant and equals one in all sampled sites, which is critical, notably in the case of rare, shy and cryptic species. The capture-recapture-like approach developed by Mackenzie et al. (2002, 2003) provides a reliable tool that accounts for imperfect detection when estimating species occurrence, as well as for assessing the relevance of site features as predictors of species occurrence probability. The aim of this study was to explore the possibility of using this approach in the context of Houbara Bustard Chlamydotis undulata in southern Tunisia. Our results show once more the low detectability of this emblematic species and stress the need to take this factor into account when estimating Houbara spatial distribution. The distribution of Houbara in southern Tunisia is more likely to be shaped by human-related than by habitat factors. In particular, Houbara occurrence was positively associated with site remoteness and camel numbers. Houbara seemed to avoid areas with high human presence and shared the most remote and agriculture-free zones with free-ranging camels.

scholarly journals Intrinsic Prey Preference and Selection of the Giant Gartersnake: A Threatened Predator in a Nonnative Prey-Dominated Community

2020 ◽  
Vol 11 (1) ◽  
pp. 164-173
Author(s):  
Julia S.M. Ersan ◽  
Brian J. Halstead ◽  
Erica L. Wildy ◽  
Michael L. Casazza ◽  
Glenn D. Wylie
Keyword(s):  
Exotic Species ◽  
Native Species ◽  
Prey Selection ◽  
Central Valley ◽  
Prey Preference ◽  
Live Prey ◽  
Species Of Conservation Concern ◽  
Conservation Concern ◽  
Behavioral Trials ◽  
Selection Of

Abstract The introduction of exotic species into an environment can introduce great change in the trophic dynamics of native species. This is of even greater concern if the native species is of conservation concern. The giant gartersnake, Thamnophis gigas, an endemic predator of the Central Valley of California and a species of conservation concern at the state and federal levels, has declined as a result of conversion of its once vast wetland habitat to agriculture. Another anthropogenic factor contributing to this snake's changing ecology is the introduction of nonnative prey into the species' habitats. These introductions have resulted in a prey community that is almost completely composed of exotic species and have potential for considerable effects. In order to assess prey preference and selection we performed three sets of behavioral trials on naïve neonates. We examined 1) neonate prey preference in response to olfactory cues of prepared prey extracts, 2) neonate consumption of different live prey items presented simultaneously; and 3) terrestrial feeding behavior and/or latency to successful attack. Results from the olfactory study suggest that native Sierran treefrogs, Pseudacris sierra, are preferred by neonates. Results from consumption trials suggest that neonates are more likely to select frog species than fish species. This is the first study that we are aware of that examines prey selection of this threatened species and serves to inform its conservation and management.

scholarly journals Voľba lesného reprodukčného materiálu v podmienkach klimatickej zmeny / Choice of forest reproductive material under conditions of climate change

2015 ◽  
Vol 61 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Dušan Gömöry ◽  
Roman Longauer ◽  
Diana Krajmerová
Keyword(s):  
Climate Change ◽  
Tree Species ◽  
Climatic Factors ◽  
Climate Scenario ◽  
Population Variation ◽  
Stress Factors ◽  
Information Uncertainty ◽  
Assisted Migration ◽  
Forest Reproductive Material ◽  
Reproductive Material

AbstractClimate change may endanger not only yield and fulfilling the social functions of European forests, but even the survival of several tree species. The study emphasises the complexity of climatic factors and physiological mechanisms, which may potentially endanger the persistence of tree populations and which cannot be reduced to problems of drought and temperature increase. A substantial inter-population variation in traits associated with the response to climatic stress, observed in provenance experiments, is a prerequisite for the choice of proper forest reproductive material (FRM) in reforestation as a strategy of climate-change mitigation. Assisted migration, i.e., transfer of FRM from source regions, currently characterised by such climate characteristics, which are expected in the target regions in the future, requires knowledge of key stress factors (depending on the climate scenario), physiological processes associated with the adaptation to this stress, identification of genes and eventually epigenetic mechanisms, controlling adaptation processes, and finally mapping of genetic and/or epigenetic variation in key genes. For most tree species, such information is not yet available. Therefore, assisted migration under such information uncertainty needs to be complemented by in situ gene conservation measures to preserve the possibility of reversing the effects of eventual erroneous decisions on FRM transfer.

scholarly journals First results on the feeding ecology of the Transcaucasian water shrew Neomys teres (Soricomorpha: Soricidae) from Armenia

2006 ◽  
Vol 84 (12) ◽  
pp. 1853-1858 ◽  
Author(s):  
Sara Churchfield ◽  
Leszek Rychlik ◽  
Eduard Yavrouyan ◽  
Kris Turlejski
Keyword(s):  
Dietary Composition ◽  
Mountainous Region ◽  
Morphological Similarity ◽  
Aquatic Habitats ◽  
Species Of Conservation Concern ◽  
Unknown Species ◽  
First Results ◽  
Foraging Niche ◽  
Conservation Concern ◽  
Neomys Fodiens

Microscopic examination of alimentary tracts of 14 Neomys teres Miller, 1908 from a mountainous region in northern Armenia produced the first data on the diet of this almost unknown species of conservation concern. Twenty-three different prey types were distinguished in summer-caught shrews, all of which were invertebrates (14 terrestrial and 9 aquatic in origin). The dominant dietary items were Coleoptera and Diptera adults, Araneae, Opiliones, and Lumbricidae, as well as freshwater crustaceans and Trichoptera larvae. Prey ranged from <3 to >16 mm in length, but those eaten most frequently were 6–10 mm in length. Although N. teres was captured beside streams and rivers, aquatic prey comprised only 27% of the dietary composition. Despite the morphological similarity of N. teres to Neomys fodiens (Pennant, 1771), its foraging niche more closely resembles that of upland populations of Neomys anomalus Cabrera, 1907 and its reliance on aquatic habitats remains equivocal.

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