scholarly journals Succession of hydrocarbon seep communities associated with the long-lived foundation species Lamellibrachia luymesi

2005 ◽  
Vol 305 ◽  
pp. 17-29 ◽  
Author(s):  
EE Cordes ◽  
S Hourdez ◽  
BL Predmore ◽  
ML Redding ◽  
CR Fisher
Keyword(s):  
Foundation Species ◽  
Hydrocarbon Seep ◽  
Lamellibrachia Luymesi

Nutrient production in rhodolith beds: impact of a foundation species and its associates

2018 ◽  
Vol 590 ◽  
pp. 53-66 ◽  
Author(s):  
LA McConnico ◽  
G Hernández-Carmona ◽  
R Riosmena-Rodríguez
Keyword(s):  
Foundation Species

Variation in disturbance to a foundation species structures the dynamics of a benthic reef community

Ecology ◽  
2021 ◽  
Author(s):  
A. Raine Detmer ◽  
Robert J. Miller ◽  
Daniel C. Reed ◽  
Tom W. Bell ◽  
Adrian C. Stier ◽  
...  
Keyword(s):  
Foundation Species ◽  
Reef Community

Multiple climate-driven cascading ecosystem effects after the loss of a foundation species

2021 ◽  
Vol 770 ◽  
pp. 144749
Author(s):  
Gianluca Sarà ◽  
Chiara Giommi ◽  
Antonio Giacoletti ◽  
Erminia Conti ◽  
Christian Mulder ◽  
...  
Keyword(s):  
Foundation Species ◽  
Ecosystem Effects

scholarly journals Genome-wide characterization of LTR retrotransposons in the non-model deep-sea annelid Lamellibrachia luymesi

BMC Genomics ◽  
2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Oluchi Aroh ◽  
Kenneth M. Halanych
Keyword(s):  
Deep Sea ◽  
Long Terminal Repeat Retrotransposons ◽  
Marine Organisms ◽  
Model Systems ◽  
Ltr Retrotransposons ◽  
Genome Wide ◽  
Lamellibrachia Luymesi ◽  
Vestimentiferan Tubeworm ◽  
Retrotransposon Activity

Abstract Background Long Terminal Repeat retrotransposons (LTR retrotransposons) are mobile genetic elements composed of a few genes between terminal repeats and, in some cases, can comprise over half of a genome’s content. Available data on LTR retrotransposons have facilitated comparative studies and provided insight on genome evolution. However, data are biased to model systems and marine organisms, including annelids, have been underrepresented in transposable elements studies. Here, we focus on genome of Lamellibrachia luymesi, a vestimentiferan tubeworm from deep-sea hydrocarbon seeps, to gain knowledge of LTR retrotransposons in a deep-sea annelid. Results We characterized LTR retrotransposons present in the genome of L. luymesi using bioinformatic approaches and found that intact LTR retrotransposons makes up about 0.1% of L. luymesi genome. Previous characterization of the genome has shown that this tubeworm hosts several known LTR-retrotransposons. Here we describe and classify LTR retrotransposons in L. luymesi as within the Gypsy, Copia and Bel-pao superfamilies. Although, many elements fell within already recognized families (e.g., Mag, CSRN1), others formed clades distinct from previously recognized families within these superfamilies. However, approximately 19% (41) of recovered elements could not be classified. Gypsy elements were the most abundant while only 2 Copia and 2 Bel-pao elements were present. In addition, analysis of insertion times indicated that several LTR-retrotransposons were recently transposed into the genome of L. luymesi, these elements had identical LTR’s raising possibility of recent or ongoing retrotransposon activity. Conclusions Our analysis contributes to knowledge on diversity of LTR-retrotransposons in marine settings and also serves as an important step to assist our understanding of the potential role of retroelements in marine organisms. We find that many LTR retrotransposons, which have been inserted in the last few million years, are similar to those found in terrestrial model species. However, several new groups of LTR retrotransposons were discovered suggesting that the representation of LTR retrotransposons may be different in marine settings. Further study would improve understanding of the diversity of retrotransposons across animal groups and environments.

scholarly journals Local Adaptation in Marine Foundation Species at Microgeographic Scales

2021 ◽  
pp. 000-000
Author(s):  
C. G. Hays ◽  
T. C. Hanley ◽  
A. R. Hughes ◽  
S. B. Truskey ◽  
R. A. Zerebecki ◽  
...  
Keyword(s):  
Local Adaptation ◽  
Foundation Species

Hydrocarbon-seep deposits in the lower Permian Angie Formation, Central Lhasa Block, Tibet

2021 ◽  
Vol 90 ◽  
pp. 258-272
Author(s):  
Chao Liu ◽  
Xianyin An ◽  
Thomas J. Algeo ◽  
Axel Munnecke ◽  
Yujie Zhang ◽  
...  
Keyword(s):  
Lower Permian ◽  
Hydrocarbon Seep

scholarly journals Growing up aspen: ontogeny and trade-offs shape growth, defence and reproduction in a foundation species

2020 ◽  
Author(s):  
Christopher T Cole ◽  
Clay J Morrow ◽  
Hilary L Barker ◽  
Kennedy F Rubert-Nason ◽  
Jennifer F L Riehl ◽  
...  
Keyword(s):  
Intraspecific Variation ◽  
Genotypic Variation ◽  
Chemical Defence ◽  
Extrafloral Nectaries ◽  
Foundation Species ◽  
Community Genetics ◽  
Indirect Defence ◽  
Juvenile Period ◽  
Trade Offs ◽  
Sex Marker

Abstract Background and Aims Intraspecific variation in foundation species of forest ecosystems can shape community and ecosystem properties, particularly when that variation has a genetic basis. Traits mediating interactions with other species are predicted by simple allocation models to follow ontogenetic patterns that are rarely studied in trees. The aim of this research was to identify the roles of genotype, ontogeny and genotypic trade-offs shaping growth, defence and reproduction in aspen. Methods We established a common garden replicating >500 aspen genets in Wisconsin, USA. Trees were measured through the juvenile period into the onset of reproduction, for growth, defence chemistry (phenolic glycosides and condensed tannins), nitrogen, extrafloral nectaries, leaf morphology (specific leaf area), flower production and foliar herbivory and disease. We also assayed the TOZ19 sex marker and heterozygosity at ten microsatellite loci. Key Results We found high levels of genotypic variation for all traits, and high heritabilities for both the traits and their ontogenetic trajectories. Ontogeny strongly shaped intraspecific variation, and trade-offs among growth, defence and reproduction supported some predictions while contradicting others. Both direct resistance (chemical defence) and indirect defence (extrafloral nectaries) declined during the juvenile stage, prior to the onset of reproduction. Reproduction was higher in trees that were larger, male and had higher individual heterozygosity. Growth was diminished by genotypic allocation to both direct and indirect defence as well as to reproduction, but we found no evidence of trade-offs between defence and reproduction. Conclusions Key traits affecting the ecological communities of aspen have high levels of genotypic variation and heritability, strong patterns of ontogeny and clear trade-offs among growth, defence and reproduction. The architecture of aspen’s community genetics – its ontogeny, trade-offs and especially its great variability – is shaped by both its broad range and the diverse community of associates, and in turn further fosters that diversity.

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