Will charophyte species increase or decrease their distribution in a changing climate?

Joye, Dominique; Rey-Boissezon, Aurélie

doi:10.1016/j.aquabot.2014.05.003

Cited by 38 publications

(17 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a dioecious species, the cost for each C. aspera shoot to develop its gametangia is lower – especially for male shoots – than for the monoecious C. hispida or N. hyalina , enabling a quicker and noticeable phenological response to small variations in the environmental drivers. Charophytes rapidly respond to changes in environmental conditions, but some species are more sensitive than others (Auderset Joye & Rey‐Boissezon, ). To a lesser extent, C. hispida also showed an autumn peak, but only for the production of gametangia and when growing in medium and deeper conditions in the LSP (Appendix S4), and in shallow conditions in the HSP (Figure b).…”

Section: Discussionmentioning

confidence: 99%

“…The main threats for both habitats are eutrophication from agriculture, hydrological changes, and climate change. Related to this, predictions under future scenarios point to the presence of ‘loser’ and ‘winner’ charophyte species, based on their environmental preferences and the new suitability of the aquatic ecosystems (Auderset Joye & Rey‐Boissezon, ); however, not only niche specialization but also specific life‐history strategies and traits explain the commonness or rarity of charophytes (Baastrup‐Spohr, Iversen, Borum, & Sand‐Jensen, ). Their ability to adapt their life cycles to different ecological conditions will also determine charophyte resilience to climate change and, consequently, the future of these habitats.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Persistence of submerged macrophytes in a drying world: Unravelling the timing and the environmental drivers to produce drought‐resistant propagules

Calero

Morellato

Rodrigo

2018

Aquatic Conservation

View full text Add to dashboard Cite

Under a warming scenario many permanent inland water bodies in the Mediterranean region have become temporary ones, so the persistence of submerged macrophytes depends on the timely production of drought‐resistant propagules. Phenological research measures the timing of ecological processes and allows the consequences of disturbances such as climate change to be evaluated. Among macrophytes, the charophytes are widely distributed benthic macroalgae and are particularly sensitive to environmental variations. The systems in which they live constitute valuable, threatened, and protected habitats (European Habitats Directive code 3140). This study established a methodological basis for determining which environmental drivers trigger the sexual reproductive phenology of charophytes. For the first time, circular statistics were applied to describe and compare seasonal patterns for submerged macrophytes. Over a period of 2 years, three charophyte species growing in two Mediterranean brackish ponds were monitored. Most of the sexual reproduction occurred during spring and summer, including the production of drought‐resistant propagules, before the harshest conditions arrived. Each species showed a distinctive phenological pattern, according to specific breeding systems, life cycles, and environmental tolerances and requirements. Deeper conditions and higher salinities delayed reproduction. Different rainfall intensities in autumn produced distinctions between years, as stronger rainfall reduced the salinity stress and stimulated the reproduction of plants. Interacting factors act as cues for charophyte reproduction and cause antagonistic effects on propagule production. Among them, the heat required for each phenophase peak is essential for understanding the phenology of a population and for predicting its long‐term persistence. Charophytes appear to be good candidates for tracking climate change in shallow ecosystems. Further phenological studies should consider more species, populations, and long‐term observations in order to predict climate‐change effects on water bodies, and to develop effective plans for management and conservation. Circular statistics is a potential tool for analysing phenology in the context of global warming, as well as for many other conservation issues.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Persistence of submerged macrophytes in a drying world: Unravelling the timing and the environmental drivers to produce drought‐resistant propagules

Calero

Morellato

Rodrigo

2018

Aquatic Conservation

View full text Add to dashboard Cite

show abstract

“…Consequently, many charophytes have become rare or even endangered in recent decades (Baastrup‐Spohr et al. ) and further changes are predicted in a changing climate (Auderset Joye and Rey‐Boissezon ). Accurate identification of charophyte species is, however, critical for understanding their diversity and for documenting changes in species distribution.…”

mentioning

confidence: 99%

DNA barcoding the genus Chara: molecular evidence recovers fewer taxa than the classical morphological approach

Schneider

Rodrigues

Moe

et al. 2015

Journal of Phycology

View full text Add to dashboard Cite

Charophytes (Charales) are benthic algae with a complex morphology. They are vulnerable to ecosystem changes, such as eutrophication, and are red-listed in many countries. Accurate identification of Chara species is critical for understanding their diversity and for documenting changes in species distribution. Species delineation is, however, complicated, because of high phenotypic plasticity. We used barcodes of the ITS2, matK and rbcL regions to test if the distribution of barcode haplotypes among individuals is consistent with species boundaries as they are currently understood. The study included freshly collected and herbarium material of 91 specimens from 10 European countries, Canada and Argentina. Results showed that herbarium specimens are useful as a source of material for genetic analyses for aquatic plants like Chara. rbcL and matK had highest sequence recoverability, but rbcL had a somewhat lower discriminatory power than ITS2 and matK. The tree resulting from the concatenated data matrix grouped the samples into six main groups contrary to a traditional morphological approach that consisted of 14 different taxa. A large unresolved group consisted of C. intermedia, C. hispida, C. horrida, C. baltica, C. polyacantha, C. rudis, C. aculeolata, and C. corfuensis. A second unresolved group consisted of C. virgata and C. strigosa. The taxa within each of the unresolved groups shared identical barcode sequences on the 977 positions of the concatenated data matrix. The morphological differences of taxa within both unresolved groups include the number and length of spine cells, stipulodes, and bract cells. We suggest that these morphological traits have less taxonomic relevance than hitherto assumed.

show abstract

“…Previous studies have found evidence of species–environment relationships within macrophyte communities (Auderset Joye & Rey‐Boissezon, ; Baastrup‐Spohr, Iversen, Borum, & Sand‐Jensen, ; Chappuis, Gacia, & Ballesteros, ; Escobar, Qiao, Phelps, Wagner, & Larkin, ; Heegaard, Birks, Gibson, Smith, & Wolfe‐Murphy, ; Lambert‐Servien, Clemenceau, Gabory, Douillard, & Haury, ; Midwood, Darwin, Ho, Rokitnicki‐Wojcik, & Grabas, ; Rey‐Boissezon & Auderset Joye, ; Torn, Kovtun‐Kante, Herkül, Martin, & Mäemets, ; Wood, ). Rey‐Boissezon and Auderset Joye () used multivariate analyses with nine chemical and environmental factors across Switzerland to identify specialist and generalist species within the Characeae.…”

Section: Introductionmentioning

confidence: 98%

Untangling climate and water chemistry to predict changes in freshwater macrophyte distributions

Sleith

Wehr

Karol

2018

Ecology and Evolution

View full text Add to dashboard Cite

Forecasting changes in the distributions of macrophytes is essential to understanding how aquatic ecosystems will respond to climate and environmental changes. Previous work in aquatic ecosystems has used climate data at large scales and chemistry data at small scales; the consequence of using these different data types has not been evaluated. This study combines a survey of macrophyte diversity and water chemistry measurements at a large regional scale to demonstrate the feasibility and necessity of including ecological measurements, in addition to climate data, in species distribution models of aquatic macrophytes. A survey of 740 water bodies stratified across 327,000 square kilometers was conducted to document Characeae (green macroalgae) species occurrence and water chemistry data. Chemistry variables and climate data were used separately and in concert to develop species distribution models for ten species across the study area. The impacts of future environmental changes on species distributions were modeled using a range of global climate models (GCMs), representative concentration pathways (RCPs), and pollution scenarios. Models developed with chemistry variables generally gave the most accurate predictions of species distributions when compared with those using climate variables. Calcium and conductivity had the highest total relative contribution to models across all species. Habitat changes were most pronounced in scenarios with increased road salt and deicer influences, with two species predicted to increase in range by >50% and four species predicted to decrease in range by >50%. Species of Characeae have distinct habitat ranges that closely follow spatial patterns of water chemistry. Species distribution models built with climate data alone were insufficient to predict changes in distributions in the study area. The development and implementation of standardized, large‐scale water chemistry databases will aid predictions of habitat changes for aquatic ecosystems.

show abstract

Will charophyte species increase or decrease their distribution in a changing climate?

Cited by 38 publications

References 46 publications

Persistence of submerged macrophytes in a drying world: Unravelling the timing and the environmental drivers to produce drought‐resistant propagules

Persistence of submerged macrophytes in a drying world: Unravelling the timing and the environmental drivers to produce drought‐resistant propagules

DNA barcoding the genus Chara: molecular evidence recovers fewer taxa than the classical morphological approach

Untangling climate and water chemistry to predict changes in freshwater macrophyte distributions

Contact Info

Product

Resources

About