Abstract:
:Worldwide, macroalgae have invaded near-shore marine ecosystems. However, their haplodiplontic life cycles have complicated efforts to predict patterns of growth and spread, particularly since most theoretical predictions are derived from diplontic taxa (i.e., animals). To complete one revolution of the life cycle, two separate ploidy stages, often including separate haploid sexes, must pass through development and reproduction. In the case of the invasive, red macroalga Agarophyton vermiculophyllum, during the invasion of soft-sediment estuaries throughout the Northern Hemisphere, diploid tetrasporophytes came to dominate all free-floating populations and haploid gametophytes were consistently lost. The ecological hypothesis of nutrient limitation might contribute to an explanation of this pattern of tetrasporophytic dominance in free-floating populations. Under this hypothesis, gametophytes should outperform tetrasporophytes under nutrient limited conditions, but tetrasporophytes should be better able to exploit optimal or even abundant nutrient conditions, such as in eutrophic estuaries. We sampled tetrasporophytes, male gametophytes, and female gametophytes from two sites each located on either side of the Delmarva Peninsula that separates the Chesapeake Bay from the Atlantic Ocean. We subjected apices excised from multiple thalli from each life cycle stage to a nutrient-enriched and a nutrient-poor seawater treatment and assessed growth and survival. While nutrient addition increased growth rates, there was no significant difference among ploidies or sexes. Gametophytes did, however, suffer higher mortality than tetrasporophytes. We discuss how nutrient-dependent differences in growth and survival may contribute to observed patterns of tetrasporophytic dominance in soft-sediment A. vermiculophyllum populations.
journal_name
J Phycoljournal_title
Journal of phycologyauthors
Krueger-Hadfield SA,Ryan WHdoi
10.1111/jpy.13011subject
Has Abstractpub_date
2020-08-01 00:00:00pages
1114-1120issue
4eissn
0022-3646issn
1529-8817journal_volume
56pub_type
杂志文章abstract::A small siliceous species of marine phytoplankton, order Parmales (Heterokonta), was isolated and characterized for the first time with the aid of a fluorescent silicon tracer 2-(4-pyridyl)-5-([4-(2-dimethylaminoethylaminocarbamoyl)-methoxy]phenyl)oxazole (PDMPO). This dye was easily detected by clear fluorescence in ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2010.00926.x
更新日期:2011-02-01 00:00:00
abstract::In this study, we highlight the effects of methyl jasmonate (MeJa) on cystocarp development in the red macroscopic alga Grateloupia imbricata. In G. imbricata, jasmonate release is related to the reproductive state, as fertile thalli (i.e., those that have cystocarps) released significant amounts of this volatile comp...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12467
更新日期:2016-12-01 00:00:00
abstract::We tested how the availability of carbon and nitrogen determines both the production of Asparagopsis taxiformis (Delile) V. Trevis. and content of the two major halocarbons, bromoform and dibromoacetic acid. The halogenated secondary metabolites of Asparagopsis species are particularly interesting from an applied pers...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01083.x
更新日期:2012-02-01 00:00:00
abstract::Species diversity within the genus Osmundea in the Macaronesian region was explored by conducting a comprehensive sampling in the Azores, the Canary, and the Madeira archipelagos. Toward identification, all specimens were first observed alive to verify the absence of corps en cerise, a diagnostic character for the gen...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12431
更新日期:2016-08-01 00:00:00
abstract::The study of the microalgal growth kinetics is an indispensable tool in all fields of phycology. Knowing the optimal nutrient concentration is an important issue that will help to develop efficient growth systems for these microorganisms. Although nitrogen and phosphorus are well studied for this purpose, sulfur seems...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12367
更新日期:2016-02-01 00:00:00
abstract::Global climate change is expected to alter the polar bioregions faster than any other marine environment. This study assesses the biodiversity of seaweeds and associated eukaryotic pathogens of an established study site in northern Baffin Island (72° N), providing a baseline inventory for future work assessing impacts...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12417
更新日期:2016-08-01 00:00:00
abstract::Toxicities of cadmium (Cd) and zinc (Zn) to the green alga Selenastrum capricornutum Printz were determined over 72 h in defined synthetic media buffered by citrate (FRAQCIT ; [citrate] = 100 μM or 5 μM) or nitrilotriacetate (FRAQNTA ; [NTA] = 5 μM). Algal sensitivity to free Cd2 + or free Zn2 + in FRAQCIT was much hi...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1046/j.1529-8817.2000.99103.x
更新日期:2000-06-01 00:00:00
abstract::An adverse consequence of applying morphology-based taxonomic systems to catalog cyanobacteria, which generally are limited in the number of available morphological characters, is a fundamental underestimation of natural biodiversity. In this study, we further dissect the polyphyletic cyanobacterial genus Lyngbya and ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12115
更新日期:2013-12-01 00:00:00
abstract::In Chlamydomonas reinhardtii P. A. Dangeard, mitochondrial morphology has been observed during asexual cell division cycle, gamete and zygote formation, zygote maturation, and meiotic stages. However, the chronological transition of mitochondrial morphology after the stationary phase of vegetative growth, defined as t...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12040
更新日期:2013-04-01 00:00:00
abstract::Comparisons of the 3 previously used methods (continuous flow centrifugation, Millipore®filtration, and biodialysis) for making water samples seston-free before analysis for cobalamins point to several likely sources of error: (a) unpredictable occlusion of pores in Millipore®membranes during filtration; (b) irreversi...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1969.tb02590.x
更新日期:1969-06-01 00:00:00
abstract::Phytoplankton forms the basis of primary production in mangrove environments. The phylogeny and diversity based on the amplification and sequencing of rbcL, the large subunit encoding the key enzyme ribulose-1, 5-bisphosphate carboxylase/oxygenase was investigated for improved understanding of the community structure ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12163
更新日期:2014-04-01 00:00:00
abstract::The marine dinoflagellate, Glenoclinium foliaceum Stein, has been shown to contain fucoxanthin, instead of peridinin, as the major xanthophyll. In addition, 2 carotenes-β-carotene and a compound with spectral properties reminiscent of isomerized y-carotene-and 2 xanthophylls-diadinoxanthin and an unidentified compound...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1968.tb04706.x
更新日期:1968-12-01 00:00:00
abstract::Over the last two decades, many studies on functional morphology have suggested that material properties of seaweed tissues may influence their fitness. Because hydrodynamic forces are likely the largest source of mortality for seaweeds in high wave energy environments, tissues with material properties that behave fav...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01066.x
更新日期:2011-12-01 00:00:00
abstract::Nitzschia sublinearis Hustedt and N. pura Hustedt are common oligosaprobic freshwater diatom species that frequently occur in diatom inventories, thus being important in water quality studies. Both are considered as species with overlapping diagnostic criteria in several floras, which is typical of the whole genus Nit...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2009.00692.x
更新日期:2009-06-01 00:00:00
abstract::Eukaryotes such as plants and the unicellular green alga Chlamydomonas reinhardtii P. A. Dang. produce and secrete compounds that mimic N-acyl homoserine lactone (AHL) bacterial quorum-sensing (QS) signals and alter QS-regulated gene expression in the associated bacteria. Here, we show that the set of C. reinhardtii s...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01049.x
更新日期:2011-10-01 00:00:00
abstract::A giant form of Anadyomene, most similar to Anadyomene pavonina (J. Agardh) Wille, a rare and diminutive alga endemic to Florida, appeared as up to 10 m long net-like strands covering 10%-80% of a 0.5 km region of the 25-50 m deep Belizean outer reef slope where none had been present up to 12 months earlier. This new ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01108.x
更新日期:2012-02-01 00:00:00
abstract::Telomeres generally consist of short repeats of minisatellite DNA sequences and are useful in chromosome identification and karyotype analysis. To date, telomeres have not been characterized in the economically important brown seaweed Saccharina japonica, thus its full cytogenetic research and genetic breeding potenti...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12497
更新日期:2017-02-01 00:00:00
abstract::Macromolecular variability in microalgal populations subject to different nutrient environments was investigated, using the chlorophyte alga Scenedesmus quadricauda (Turpin) Bréb. as a model organism. The large size of the four-cell coenobia in the strain used in this study (∼35 μm diameter) conveniently allowed high ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00564.x
更新日期:2008-10-01 00:00:00
abstract::Pyropia yezoensis (Ueda) M. S. Hwang et H. G. Choi (previously called Porphyra yezoensis) is an economically important alga. The blades generated from conchospores are genetic chimeras, which are not suitable for genetic similarity analysis. In this study, two types of blades from a single filament of P. yezoensis spo...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12058
更新日期:2013-06-01 00:00:00
abstract::The formation of archeospores is characteristic of Porphyra yezoensis Ueda and is important for Porphyra aquaculture. Recently, it has been regarded as a valuable seed source for propagation of thalli in mariculture. Cell wall composition changes are associated with archeospore formation in P. yezoensis. Here, we repo...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2011.01003.x
更新日期:2011-08-01 00:00:00
abstract::Macroalgal bloom-forming species occur in coastal systems worldwide. However, due to overlapping morphologies in some taxa, accurate taxonomic assessment and classification of these species can be quite challenging. We investigated the molecular and morphological characteristics of 153 specimens of bloom-forming Ulva ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12108
更新日期:2013-10-01 00:00:00
abstract::A previously unknown species of kelp was collected on Kagamil Island, Aleutian Islands. The species can be easily distinguished from any known laminarialean alga: the erect sporophytic thallus is composed of a thin lanceolate blade attaining ∼2 m in height and ∼0.50 m in width, without midrib, and the edge of the blad...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2008.00548.x
更新日期:2008-08-01 00:00:00
abstract::The history of group I introns is characterized by repeated horizontal transfers, even among phylogenetically distant species. The symbiogenetic thalli of lichens are good candidates for the horizontal transfer of genetic material among distantly related organisms, such as fungi and green algae. The main goal of this ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12600
更新日期:2018-02-01 00:00:00
abstract::Coralline red algae play a key role in the ecology of near shore marine ecosystems and are increasingly being used to study the effects of climate change in the marine environment. Corallines are very difficult to identify to species, and even to genus, using morpho-anatomy, likely complicating studies of their ecolog...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12205
更新日期:2014-08-01 00:00:00
abstract::Characeae (Charophyceae, Charophyta) contains two tribes with six genera: tribe Chareae with four genera and tribe Nitelleae, which includes Tolypella and Nitella. This paper uses molecular and morphological data to elucidate the phylogeny of Tolypella species in North America. In the most comprehensive taxonomic trea...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12229
更新日期:2014-10-01 00:00:00
abstract::Microbial eukaryotes may extinguish much of their nuclear phylogenetic history due to endosymbiotic/horizontal gene transfer (E/HGT). We studied E/HGT in 32,110 contigs of expressed sequence tags (ESTs) from the dinoflagellate Alexandrium tamarense (Dinophyceae) using a conservative phylogenomic approach. The vast maj...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2012.01194.x
更新日期:2012-10-01 00:00:00
abstract::The ultrastructural changes which occurred during senescence in the stationary phase of growth of the unicellular green alga Spongiochloris typica were observed. The cell wall consists of a membrane like primary wall and an inner secondary wall which becomes progressively thickened with age of the culture. During sene...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1968.tb04696.x
更新日期:1968-12-01 00:00:00
abstract::Although light and salt stresses are known to enhance the biosynthesis of astaxanthin in certain green algae, the mechanism of their action remains largely unknown. Here we report the regulation of the genes encoding phytoene desaturase (PDS), carotenoid hydroxylase (CHYb), and carotenoid ketolase (BKT) in the green a...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.2009.00689.x
更新日期:2009-06-01 00:00:00
abstract::Two new varieties of Staurastrum (Desmidiaceae) are described from Sao Paulo, southern Brazil: St. polymorphum Bréb. var. itirapinense and St. quadrangulare Bréb. var. sanctipaulense. ...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/j.1529-8817.1967.tb04630.x
更新日期:1967-03-01 00:00:00
abstract::Filaments in the surface layers of metaphytic mats are exposed to high photon flux densities of PAR and UVBR. We investigated the effect of UVBR exposure on growth of eight isolates of common metaphytic algae (Cladophora, Mougeotia, Oedogonium, Pithophora, Spirogyra, and Zygnema) acclimated to either high or low PAR l...
journal_title:Journal of phycology
pub_type: 杂志文章
doi:10.1111/jpy.12786
更新日期:2018-12-01 00:00:00