Detritus Processing in Tri‐Trophic Food Chains: a Modelling Approach

Alemanno, Sara; Mancinelli, Giorgio; Basset, Alberto

doi:10.1002/iroh.200510952

Cited by 8 publications

(3 citation statements)

References 45 publications

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“…Phragmites australis) . The detritus-based macrozoobenthic assemblages constitute the primary consumers in the brown trophic food webs of Mediterranean coastal lagoons [ 47 ]. However, the long-term disuse of large aquatic artificial systems leads to a loss of structural and functional heterogeneity resulting in a homogenization of trophic structures and a decrease of the values of biological diversity.…”

Section: Discussionmentioning

confidence: 99%

Detritus-based assemblage responses under salinity stress conditions in a disused aquatic artificial ecosystem

Cerfolli

Bellisario

Battisti³

2013

Aquat Biosyst

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BackgroundDespite the plethora of approaches, the sensitivity of the methods to measure the relationship between the abundance and biomass curves in stressed detritus-based ecosystems still remain to be refined. In this work, we report the comparison between biomass and abundance in a set of detritus-based macrozoobenthic assemblages located in six sampling pools with different salinity in an artificial aquatic ecosystem (disused Tarquinia Saltworks), using two diversity/dominance approaches (Abundance/Biomass Comparisons, or ABC, and Whittaker plots). We also evaluated the contribution of abundances and biomasses diversity (Simpson index) and nestedness, which measures the order by which macroinvertebrates colonized the detrital resource.ResultsThe outputs obtained by both ABC curves and Whittaker plots highlight two different thresholds in assemblage structure: between about 44 and 50 practical salinity unit (psu) and between 50 and 87 psu, respectively. The first threshold was due to a turnover in taxon composition between assemblages, the second threshold (evidenced by Whittaker plots) was due to a change in taxon richness (lower in pools with higher salinity: i.e. > 50 psu). Moreover, a normal-shaped pattern in diversity (Simpson index) emerged, suggestive of an intermediate disturbance effect. The nested pattern did not show significant differences when considering the density and biomass of the sampled taxa, providing similar threshold of salinity in the relative contribution of macrozoobenthos on nestedness.ConclusionsThe use of detailed (ABC and Whittaker plots) and macroscopic (Simpson index and nestedness) approaches is proposed to identify thresholds in the structuring and functioning of detritus-based community of disused aquatic ecosystems: in particular, the inclusion of the parameter of biomass (scarcely utilized in community-based research) appears crucial. The responses of macrozoobenthic assemblages to the salinity stress conditions, in term of abundance and biomass, using a detritus food source (Phragmites australis leaves), may also highlight, by comparing macroscopic and detailed approaches, structuring and functioning patterns to consider for the management of disused artificial ecosystems.

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Section: Discussionmentioning

confidence: 99%

Detritus-based assemblage responses under salinity stress conditions in a disused aquatic artificial ecosystem

Cerfolli

Bellisario

Battisti³

2013

Aquat Biosyst

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“…У I. balthica basteri хорошо развиты сильно хитинизированные челюсти, с помощью которых они могут отгрызать кусочки макрофитов и активно перетирать их (Naylor, 1955). У L. monodi, напротив, челюсти приспособлены к соскабливанию микрообрастаний с субстрата (Alemanno et al, 2007). Таким образом, I. balthica basteri потребляет, в основном, мягкие части талломов макрофитов, а L. monodi -эпифитные микроводоросли (Hmeleva, 1973;Alemanno et al, 2007).…”

Section: таблицаunclassified

“…У L. monodi, напротив, челюсти приспособлены к соскабливанию микрообрастаний с субстрата (Alemanno et al, 2007). Таким образом, I. balthica basteri потребляет, в основном, мягкие части талломов макрофитов, а L. monodi -эпифитные микроводоросли (Hmeleva, 1973;Alemanno et al, 2007).…”

Section: таблицаunclassified

Жизненные Стратегии Равноногих Ракообразных В Условиях Черноморского Сообщества Обрастания

Varigin¹

2015

Biosys. divers.

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Рассмотрены характерные черты жизненных стратегий двух массовых видов равноногих ракообразных Idotea balthica basteri (Pallas, 1772) и Lekanesphaera monodi (Arcangeli, 1934), совместно обитающих в сообществе обрастания прибрежной зоны Одесского залива Черного моря. Отмечена сбалансированность межвидовых отношений изучаемых видов в данном сообществе. Их конкурентные отношения носили диффузный характер, отражающий относительно слабые по силе межвидовые взаимодействия. Экологические ниши этих видов перекрывались лишь по местообитанию. По трофическим и временным характеристикам конкуренция между ними ослаблена. Отмечена эффективность жизненных стратегий обоих видов ракообразных, что подтверждается их массовостью в сообществе обрастания Одесского залива Черного моря.

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Seasonal abundance and trophic position of the Atlantic blue crab Callinectes sapidus Rathbun 1896 in a Mediterranean coastal habitat

Carrozzo

Potenza

Carlino

et al. 2014

Rend. Fis. Acc. Lincei

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The blue crab Callinectes sapidus, native to the western coasts of the Atlantic Ocean, has been introduced in Mediterranean waters where it is currently considered an invasive species. Here, we verified the occurrence of an established population of C. sapidus in the Torre Colimena basin, a Mediterranean habitat located in SE Italy, and provided a first assessment of its functional role in a Mediterranean coastal ecosystem. Crab traps were used to estimate the species abundance at a seasonal frequency; in addition, its trophic position was estimated in summer using nitrogen stable isotopes. Estimations were performed using both a generally adopted value of 3.4 % for the nitrogen trophic level fractionation factor D15N, and species-specific\ud estimations obtained from the literature. C. sapidus was sampled throughout the year, reaching peak abundances in summer. This result, taken together with the observed patterns of variation in the average body size and sex ratio of captured specimens, provided evidence of a fully established population in the Torre Colimena basin. The estimated trophic position of the crab was consistent with the literature information on western Atlantic populations,\ud and resulted, irrespective of the fractionation factor used, significantly provided novel information on the occurrence and potential functional impact of this non-indigenous species in Mediterranean coastal habitats, highlighting current knowledge lacunae and identifying future research lines on marine\ud alien species. than those characterizing an autochthonous brachyuran (Pachygrapsus marmoratus) and a fish predator (Sparus aurata). The present study provided novel information on the occurrence and potential functional impact of this non-indigenous species in Mediterranean coastal habitats, highlighting current knowledge lacunae and identifying future research lines on marine alien species

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Detritus Processing in Tri‐Trophic Food Chains: a Modelling Approach

Cited by 8 publications

References 45 publications

Detritus-based assemblage responses under salinity stress conditions in a disused aquatic artificial ecosystem

Detritus-based assemblage responses under salinity stress conditions in a disused aquatic artificial ecosystem

Жизненные Стратегии Равноногих Ракообразных В Условиях Черноморского Сообщества Обрастания

Seasonal abundance and trophic position of the Atlantic blue crab Callinectes sapidus Rathbun 1896 in a Mediterranean coastal habitat

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