scholarly journals Combined effects of life‐history traits and human impact on extinction risk of freshwater megafauna

2020 ◽  
Author(s):  
Fengzhi He ◽  
Simone D. Langhans ◽  
Christiane Zarfl ◽  
Roland Wanke ◽  
Klement Tockner ◽  
...  
Keyword(s):  
Life History ◽  
Human Impact ◽  
Life History Traits ◽  
Extinction Risk ◽  
Combined Effects

Combined effects of hypoxia and ammonia to Daphnia similis estimated with life-history traits

2013 ◽  
Vol 20 (8) ◽  
pp. 5379-5387 ◽  
Author(s):  
Kai Lyu ◽  
Huansheng Cao ◽  
Rui Chen ◽  
Qianqian Wang ◽  
Zhou Yang
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Combined Effects ◽  
Daphnia Similis

scholarly journals Life-history traits and habitat availability shape genomic diversity in birds: implications for conservation

2021 ◽  
Vol 288 (1961) ◽  
Author(s):  
Anna Brüniche-Olsen ◽  
Kenneth F. Kellner ◽  
Jerrold L. Belant ◽  
J. Andrew DeWoody
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Management Practices ◽  
Sequence Data ◽  
Extinction Risk ◽  
Conservation Status ◽  
Genomic Variation ◽  
Genomic Diversity ◽  
Whole Genome Sequence ◽  
Habitat Availability

More than 25% of species assessed by the International Union for Conservation of Nature (IUCN) are threatened with extinction. Understanding how environmental and biological processes have shaped genomic diversity may inform management practices. Using 68 extant avian species, we parsed the effects of habitat availability and life-history traits on genomic diversity over time to provide a baseline for conservation efforts. We used published whole-genome sequence data to estimate overall genomic diversity as indicated by historical long-term effective population sizes ( N e ) and current genomic variability ( H ), then used environmental niche modelling to estimate Pleistocene habitat dynamics for each species. We found that N e and H were positively correlated with habitat availability and related to key life-history traits (body mass and diet), suggesting the latter contribute to the overall genomic variation. We found that H decreased with increasing species extinction risk, suggesting that H may serve as a leading indicator of demographic trends related to formal IUCN conservation status in birds. Our analyses illustrate that genome-wide summary statistics estimated from sequence data reflect meaningful ecological attributes relevant to species conservation.

scholarly journals Combined effects of colonial size and concentration ofMicrocystis aeruginosaon the life history traits ofDaphnia similoides

2015 ◽  
Vol 66 (3) ◽  
pp. 282-292 ◽  
Author(s):  
Xiaoli Zhang ◽  
Daogui Deng ◽  
Kun Zhang ◽  
Wenping Wang ◽  
Lei Ji
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Combined Effects

scholarly journals Life history traits and reproductive ecology of North American chorus frogs of the genus Pseudacris (Hylidae)

2021 ◽  
Vol 18 (1) ◽  
Author(s):  
Jeffrey P. Ethier ◽  
Aurore Fayard ◽  
Peter Soroye ◽  
Daeun Choi ◽  
Marc J. Mazerolle ◽  
...  
Keyword(s):  
Life History ◽  
North America ◽  
Life History Traits ◽  
Extinction Risk ◽  
Conservation Status ◽  
Reproductive Ecology ◽  
Wide Distribution ◽  
Chorus Frogs ◽  
The Usa ◽  
Chorus Frog

AbstractAmphibian biodiversity is declining globally, with over 40% of species being considered threatened to become extinct. Crucial to the success of conservation initiatives are a comprehensive understanding of life history and reproductive ecology of target species. Here we provide an overview of the Pseudacris genus, including breeding behaviour, reproduction, development, survival and longevity. We present an updated distribution map of the 18 species found throughout North America. We also summarize the conservation status at the national and subnational (state, provincial, and territorial) levels, in Canada, USA, and Mexico, to evaluate the relationship between life history traits and extinction risk. Results show a high degree of consistency in the life history traits of Pseudacris species considering their relative diversity and wide distribution in North America. However, data are lacking for several species, particularly in the Fat Frog and West Coast clades, causing some uncertainties and discrepancies in the literature. We also found that the most threatened populations of chorus frog were located in the east coast of the USA, potentially as a result of increased levels of anthropogenic disturbance. We suggest that the similarities in life history traits among chorus frog species provides an opportunity for collaboration and united efforts for the conservation of the genus.

scholarly journals Life-history traits and extrinsic threats determine extinction risk in New Zealand lizards

2013 ◽  
Vol 165 ◽  
pp. 62-68 ◽  
Author(s):  
Reid Tingley ◽  
Rod A. Hitchmough ◽  
David G. Chapple
Keyword(s):  
Life History ◽  
New Zealand ◽  
Life History Traits ◽  
Extinction Risk

scholarly journals The Combined Effects of Bacterial Symbionts and Aging on Life History Traits in the Pea Aphid, Acyrthosiphon pisum

2013 ◽  
Vol 80 (2) ◽  
pp. 470-477 ◽  
Author(s):  
Alice M. Laughton ◽  
Maretta H. Fan ◽  
Nicole M. Gerardo
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Acyrthosiphon Pisum ◽  
Immune Cell ◽  
Host Population ◽  
Pea Aphid ◽  
Combined Effects ◽  
Content Type ◽  
Secondary Symbiont ◽  
Cell Counts

ABSTRACTWhile many endosymbionts have beneficial effects on hosts under specific ecological conditions, there can also be associated costs. In order to maximize their own fitness, hosts must facilitate symbiont persistence while preventing symbiont exploitation of resources, which may require tight regulation of symbiont populations. As a host ages, the ability to invest in such mechanisms may lessen or be traded off with demands of other life history traits, such as survival and reproduction. Using the pea aphid,Acyrthosiphon pisum, we measured survival, lifetime fecundity, and immune cell counts (hemocytes, a measure of immune capacity) in the presence of facultative secondary symbionts. Additionally, we quantified the densities of the obligate primary bacterial symbiont,Buchnera aphidicola, and secondary symbionts across the host's lifetime. We found life history costs to harboring some secondary symbiont species. Secondary symbiont populations were found to increase with host age, whileBuchnerapopulations exhibited a more complicated pattern. Immune cell counts peaked at the midreproductive stage before declining in the oldest aphids. The combined effects of immunosenescence and symbiont population growth may have important consequences for symbiont transmission and maintenance within a host population.

scholarly journals A database of threat statuses and life-history traits of Red List species in Flanders (northern Belgium)

2019 ◽  
Vol 7 ◽  
Author(s):  
Dirk Maes ◽  
Dimitri Brosens ◽  
Filiep T’jollyn ◽  
Peter Desmet ◽  
Frederic Piesschaert ◽  
...  
Keyword(s):  
Life History ◽  
Life History Traits ◽  
Legal Status ◽  
Extinction Risk ◽  
Red List ◽  
Nutrient Level ◽  
Control Procedure ◽  
Temporal And Spatial Distribution ◽  
Dispersal Capacity ◽  
Red Lists

Red Lists estimate the extinction risk of species at global or regional levels and are important instruments in conservation policies. Global Red List assessments are readily available via the IUCN website (https://www.iucnredlist.org) and are regularly updated by (taxonomic) experts. Regional Red Lists, however, are not always easy to find and often use local criteria to assess the local extinction risk of species. Here, we publish a database with the outcome of 38 Red List assessments in Flanders (northern Belgium) between 1994 and 2018. In total, the database contains 6,224 records of 5,039 unique taxa pertaining to 24 different taxonomic groups. Using a quality control procedure, we evaluated the criteria used, the number of records, the temporal and spatial distribution of the data and the up-to-dateness of the Red Lists. This way, nineteen Red Lists were approved as being of sufficient high quality (i.e. validated) and nineteen others were not. Once validated, Red Lists are approved by the regional Minister of Environment and published in the Belgian Official Gazette acquiring legal status. For the validated Red Lists, we additionally compiled (life-history) traits that are applicable to a wide variety of species groups (taxonomic kingdom, environment, biotope, nutrient level, dispersal capacity, lifespan and cuddliness). The publication of this dataset allows comparison of Red List statuses with other European regions and countries and permits analyses about how certain (life-history) traits can explain the Red List status of species. The dataset will be regularly updated by adding new Red List (re)assessments and/or additional (life-history) traits.

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