Decadal demographic trends of a long-lived temperate encrusting sponge

Teixidó, Núria; Pineda, Mari Carmen; Garrabou, Joaquim

doi:10.3354/meps07757

Cited by 25 publications

(21 citation statements)

References 50 publications

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“…Instead, biological factors (growth rates, recruitment, competition and successional patterns) should be the major driver of patterns found at the site level (or, alternatively, should explain most of the variability found at the site level). As mentioned previously, coralligenous (Garrabou 1999;Linares et al 2007;Teixidó et al 2009Teixidó et al , 2011. Additionally, these species generally display a limited dispersal capacity (Uriz 1998;Duran 2003;Abbiati et al 2009;Ledoux et al 2010b).…”

Section: Discussionmentioning

confidence: 93%

Structure and biodiversity of coralligenous assemblages over broad spatial and temporal scales

et al. 2015

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>100 km apart) showed the lowest values in comparison with the differences found at the site level (<1 km apart). Despite the differences, the sites displayed high similarity (average similarity 55.7 %) and shared approximately 50 % of the species. Similarly, the patterns of diversity at different scales, the alpha (site) and gamma (locality) were consistent with the specific composition trends, whereas the beta diversity showed the greatest differences among sites. Our results demonstrate the moderate spatial variability in biodiversity in the NW Mediterranean region and an extremely low temporal variability. This study provides baselines for detecting potential effects due to global change, and it furnishes a basis for the implementation of monitoring schemes of coralligenous assemblages. The development of similar sampling schemes in other Mediterranean regions will provide a global view of the biodiversity of coralligenous outcrops.

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Section: Discussionmentioning

confidence: 93%

Structure and biodiversity of coralligenous assemblages over broad spatial and temporal scales

et al. 2015

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“…However, the monitored sponges proved to be very dynamic organisms that were able to undergo fragmentation, contraction, or merging and showed seasonal growth trends, with peaks generally occurring during spring or summer (Sarà, 1970;Ayling, 1983;Pansini & Pronzato, 1985;Turon et al, 1998;Garrabou & Zabala, 2001;De Caralt et al, 2008;Teixidó et al, 2009;Cardone et al, 2010).…”

Section: Discussionmentioning

confidence: 97%

“…The sponge life cycle includes four principal stages: (i) recruitment, (ii) growth, (iii) fusion and fragmentation, and (iv) mortality of individuals (Teixidó et al, 2009). In T. anhelans, an increase in the number of individuals is observed in spring, from March to May.…”

Section: Discussionmentioning

confidence: 99%

“…Also the encrusting sponge Crambe crambe from the shallow waters of Blanes (Spain, western Mediterranean Sea) shows a seasonal growth pattern, with size increases occurring from May to October, in coincidence with the rise of seawater temperature (Turon et al, 1998). Dynamics of the same species from the Medes Islands were studied for 14 years (Teixidó et al, 2009) in deeper waters (between 12 and 16 m). Smaller individuals exhibited elevated growth rates, but high mortality, while large, old sponges grew slowly, but survived for the entire considered period.…”

Section: Introductionmentioning

confidence: 99%

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Temporal variations in growth and reproduction of Tedania anhelans and Chondrosia reniformis in the North Adriatic Sea

et al. 2011

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Most works concerning growth and reproduction of Mediterranean sponges have been performed in the oligotrophic western Mediterranean while little is known about sponge dynamics in the North-western Adriatic Sea, a basin characterized by low winter temperature and eutrophy. In order to deepen our understanding of sponges in the North Adriatic Sea and verify how its peculiar trophic and physical conditions affect sponge life cycles, temporal trend of sponge cover (%) and reproductive timing of Chondrosia reniformis and Tedania (Tedania) anhelans were studied over a 1-year period looking for a possible relation with variations of temperature or food availability. In C. reniformis, although little variations of sponge cover were evidenced around the year, the number of individuals and their size increase during spring. Asexual reproduction, via drop-like propagules, mainly occurs in spring and summer, while sexual reproduction is characterized by a maximum number of oocytes in August. T. anhelans progressively grows from spring to summer and develops propagules on its surface that reach their maximum size in July. In autumn, the sponge undergoes a process of progressive shrinkage and almost disappears in winter when temperature reaches 7-8°C. Larvae occur during summer. In the North Adriatic Sea sponges have larger sizes, higher density and a wider period of oocytes production compared with the same species from the Mediterranean Sea, suggesting these differences could be due to high food availability characterizing the eutrophic Adriatic basin. On the contrary, the sharp water temperature variations and the very low winter temperature, 5-6°C lower than what has been reported for the Mediterranean Sea, regulate temporal variations in abundance and cause the disappearance of thermophile species during winter.

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“…A demographic approach can be used to assess both the status and growth trends of still rather limited, even for the major structuring and habitat-forming benthic species (Teixido et al 2009, Edmunds 2010.…”

Section: Introductionmentioning

confidence: 99%

Sexual structure of a highly reproductive, recovering gorgonian population: quantifying reproductive output

Cupido¹,

Cocito²,

Manno³

et al. 2012

Mar. Ecol. Prog. Ser.

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A population of the Mediterranean red gorgonian Paramuricea clavata has exhibited unexpected resilience after being impacted by 2 anomalous mortality events in 1999 and 2003. To understand the recovery mechanisms, we examined the population reproductive structure and reproductive output based on data collected via non-destructive sampling techniques. The overall population sex ratio was balanced, though the spatial distribution of sexes was significantly segregated. Dividing the population into 14 size classes on the basis of their measured average annual growth revealed a decreasing monotonic trend of abundance of larger classes. The Recruitment class was consistently dominant. The minimum size at first reproduction was 8.5 cm in height, corresponding to an age of ~3 yr. The percentage of fertile colonies increased with size, reaching 90% in size Class 9. Polyp fecundity increased with colony size and did not differ signif- icantly between healthy and damaged colonies. As the number of mature oocytes produced by a colony is a function of polyp fecundity and of the number of reproductive polyps, colony reproduc- tive output increased exponentially with size. The population reproductive output (145 × 103 mature oocytes m−2 yr−1) was one-fifth of that measured in stable, undamaged populations and came mainly from the medium size classes. After the catastrophic mortality, the population has been recovering, albeit with reduced reproductive output. Moreover, it has exhibited a 2-fold increase in recruitment rate, 3-fold greater than that measured in other, undisturbed populations. Our findings are consistent with a strict density-dependent recruitment control operating in crowded, stable P. clavata populations

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Decadal demographic trends of a long-lived temperate encrusting sponge

Cited by 25 publications

References 50 publications

Structure and biodiversity of coralligenous assemblages over broad spatial and temporal scales

Structure and biodiversity of coralligenous assemblages over broad spatial and temporal scales

Temporal variations in growth and reproduction of Tedania anhelans and Chondrosia reniformis in the North Adriatic Sea

Sexual structure of a highly reproductive, recovering gorgonian population: quantifying reproductive output

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