Niche partitioning, shape of species response, and diversity in the phytobenthos across the rocky shoreline of a large peri-Alpine lake

Spitale, Daniel; Scalfi, Alessia; Cantonati, Marco

doi:10.1016/j.jglr.2012.09.007

Cited by 6 publications

(5 citation statements)

References 41 publications

(45 reference statements)

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“…At the landward end of its distribution, density diminished rapidly because of environmental factors or a negative interaction with Bangia atropurpurea. The spatial and temporal niches of J. bullata and B. atropurpurea overlapped widely only in early spring, whereas their optimal habitats were clearly differentiated later in the year (Spitale et al 2012).…”

Section: Ecology Of Jaoa Bullata In Lake Gardamentioning

confidence: 95%

“…We used a hierarchical sampling design and sampled low-and high-urbanization sites at each of 6 locations (2 replicates for each site). A full description of the experimental design was published by Spitale et al (2012). Our sampling design included different spatial (10 1 -10 4 m) and temporal (dates-seasons) scales (Spitale et al 2014).…”

Section: Observations On the Lake Phytobenthosmentioning

confidence: 99%

“…The 2 sites were similar with respect to aspect, slope, and shading. The unknown ulvalean alga was sampled at one of these sites (area A; lat 45°51′23′′N, long 10°52′12′′; Spitale et al 2012). At area A, we also collected algae samples for molecular analyses on 21 February and 17 July 2012 (Spitale et al 2012).…”

Section: Observations On the Lake Phytobenthosmentioning

confidence: 99%

“…The unknown ulvalean alga was sampled at one of these sites (area A; lat 45°51′23′′N, long 10°52′12′′; Spitale et al 2012). At area A, we also collected algae samples for molecular analyses on 21 February and 17 July 2012 (Spitale et al 2012). Water-level fluctuation was measured daily at the outlet (River Mincio), and we downloaded these data from the web page of the Comunità del Garda (www.lagodigarda.it).…”

Section: Observations On the Lake Phytobenthosmentioning

confidence: 99%

“…Jaoa bullata showed mainly a skewed density distribution along a gradient of depth. Plateau and symmetric responses were rarer (Spitale et al 2012). When the distribution had a long tail lakeward, J. bullata was likely to be gradually constrained by environmental factors (e.g., light attenuation), but physical dislodgment caused by zebra mussel Dreissena polymorpha (Pallas) also could have been important during summer.…”

Section: Ecology Of Jaoa Bullata In Lake Gardamentioning

confidence: 99%

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The benthic chlorophyte genus Jaoa (Ulvales), a putative China endemic, in Lake Garda, Italy: ecology, taxonomy, and molecular analyses

et al. 2014

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An unknown green alga (order Ulvales) was a dominant macroalga in the rocky littoral zone of Lake Garda (southeastern Alps). Morphological and phylogenetic analyses indicated the alga was in the genus Jaoa, considered endemic to China. The alga in Lake Garda had numerous rhizoids, a subspherical hollow thallus with irregularly lobate-saccate morphology, and 3 layers (an outer layer of small cells with distinct chloroplasts, 2 pseudoparenchymatous, large, round, and mainly hyaline cell layers). Most characteristics were in agreement with the description of Jaoa bullata, 1 of 2 species belonging to the genus Jaoa. Phylogenetic analysis based on 3 loci (rbcL, nrDNA 18S, and ITS) placed the alga in a clade with a sample identified as Jaoa prasina from a Chinese population, but with a considerable sequence distance, a result suggesting it might be a separate species. The Lake Garda alga is a siphonaxanthin-type species that possesses only nonP lipids as structural components of chloroplast (monogalactosyl diacylglycerols, digalactosyl diacylglycerols, and sulfoquinovosyl diacylglycerols) and other cell membranes (diacylglyceryl-N, N, N-trimethylhomoserine lipids). The alga is easily detected with the naked eye, occupies a characteristic belt in the eulittoral zone, and can be found wherever hard substrata are available. Neither this species nor similar taxa are mentioned in historical (end of the 19 th century) papers on benthic algae of Lake Garda, so the alga probably was introduced to the lake in relatively recent times. This alga belongs to a little-known genus, but is easily observed and was discovered in Italy's largest lake, a tourist resource of outstanding importance. It is a striking example of the degree to which lake benthic algae are understudied in many areas.

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Section: Ecology Of Jaoa Bullata In Lake Gardamentioning

confidence: 95%

Section: Observations On the Lake Phytobenthosmentioning

confidence: 99%