Littoral invertebrates associated with aquatic plants and bioassessment of ecological status in Lake Bracciano (Central Italy)

Mastrantuono, Luciana; Mancinelli, Teresa

doi:10.4081/jlimnol.2005.43

Cited by 22 publications

(25 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the other hand, the small sized Cladocerans, such as Bosmina spp., are less affected by fish predation and so they are able to maintain their numbers (St. Jacques et al, 2005). This appears to be the case in our study since the cladocerans were dominated by small sized Bosmina spp along with Chydorus sphaericus, although the high abundance of Chydorus sphaericus is related to the dense submerged vegetation (Mastrantuono and Mancinelli, 2005;Walseng et al, 2006) where the samplings were mostly conducted. Most of the recorded taxa (Keratella quadrata, Keratella cochlearis, Trichocerca sp, Filinia longiseta, Brachionus sp, Bosmina longirostris) are quite common and abundant in several eutrophic freshwaters of Greece (Michaloudi et al, 1997;Kagalou and Leonardos, 2009; Stefanidis and Papastergiadou, 2010).…”

Section: Discussionmentioning

confidence: 56%

Effects of a long term water level reduction on the ecology and water quality in an eastern Mediterranean lake

Stefanidis

Papastergiadou

2013

Knowl. Managt. Aquatic Ecosyst.

View full text Add to dashboard Cite

Key-words: fish, macrophytes, water level fluctuation, water quality, zooplanktonWater level fluctuations play a significant role in the lake nutrient dynamics, and consequently may have a strong influence on the biological communities and productivity. In this article we investigated the effects of a long term water level reduction on key chemistry parameters and major biological communities in an eastern Mediterranean lake. Our approach is based on temporal data regarding water quality, fish, zooplankton and aquatic vegetation that are representative of different water level periods. The results revealed significant correlations between water level, conductivity and chloride concentration suggesting a clear effect of the water level reduction on the water quality. Among the key findings of this study is the significant increase of zoobenthivorous fish (roach and carp) from 1973 to 1999 that correlates with the water level reduction. A decline of charophytes is also noted whereas the reed beds appear to have expanded at the shallower parts of the lake. The zooplankton composition of the lake is mostly dominated by nauplii, rotifer and small-sized crustaceans indicating a possible effect of fish predation. Overall, this article has ascertained an alarming shift of water quality and composition of biological communities that can be attributed to the combined effects of eutrophication and the extreme water level decrease. charophytes est également notée alors que les roselières se sont élargies dans les parties peu profondes du lac. La composition du zooplancton du lac est principalement dominée par les nauplii, rotifères et crustacés de petite taille indiquant un possible effet de la prédation des poissons. Dans l'ensemble, cette étude a constaté une évolution alarmante de la qualité de l'eau et de la composition des communautés biologiques qui peuvent être attribuées aux effets combinés de l'eutrophisation et de la baisse importante du niveau d'eau.

show abstract

Section: Discussionmentioning

confidence: 56%

Effects of a long term water level reduction on the ecology and water quality in an eastern Mediterranean lake

Stefanidis

Papastergiadou

2013

Knowl. Managt. Aquatic Ecosyst.

View full text Add to dashboard Cite

show abstract

“…Alona spp. and Chydorus sphaericus prefer grazing over periphyton (Mastrantuono & Mancinelli, 2005) and, therefore, are present mainly in the littoral zone within macrophyte beds. While relatively small Cladocera species (Bosmina spp.)…”

Section: Zooplankton Compositionmentioning

confidence: 99%

Influence of hydrophyte abundance on the spatial distribution of zooplankton in selected lakes in Greece

Stefanidis

Papastergiadou

2010

Hydrobiologia

View full text Add to dashboard Cite

Submerged hydrophyte vegetation consists of a highly important biotic component of maintaining lake ecosystems towards a ''clear water'' ecological status. Aquatic macrophytes are well known to play a significant multidimensional role in lakes by competing with phytoplankton growth, stabilising sediment and offering refuge to fishes, macro-invertebrates and littoral zooplankton, amongst others. Zooplanktons that are associated with macrophyte beds, in particular, may act as a positive feedback mechanism that contributes to maintaining a clear-water state. Although there are several studies investigating the relationships between macrophytes and zooplankton in European lakes, few have yet been carried out in Greek lakes. Seasonal field sampling was conducted from spring 2006 to autumn 2008 in four lakes of northwestern Greece. Zooplankton samples were collected from within hydrophyte beds in each lake to estimate their relative abundance and species density. Hydrophyte abundance and composition was recorded on a five-point scale. Moreover, water samples were analysed to determine nutrient and chlorophyll-a concentration. Pearson correlations between zooplankton density and key physicochemical variables were conducted to distinguish significant abiotic variables related with major zooplankton groups. Kruskal-Wallis non-parametric analysis was used to test for significant differences in zooplankton composition and environmental variables amongst the five hydrophyte abundance classes. In addition, Canonical correspondence analysis was used to distinguish possible correlations amongst the macrophyte and zooplankton species. Zooplankton density was significantly higher in dense macrophyte vegetation. Small-sized species (e.g. Rotifera) dominated the zooplankton community, indicating the eutrophic nature of the lakes. Large Cladocera were present in low abundance and were mostly littoral. The current research contributes to a better understanding of relationships between biotic groups in selected Greek lakes.

show abstract

“…2 and 4) also suggest poor competitive abilities, a hypothesis consistent with Mouthon and Daufresne's (2008) view that this species has failed to recover from acute thermal stress because of high competition for post-disturbance limited food resources. Low in situ abundance of the otherwise common V. piscinalis in central Italian lakes (Mastrantuono and Mancinelli, 2005; authors' personal observations), may be similarly related to poor competitive abilities, but specific studies are needed to verify this hypothesis.…”

Section: Discussionmentioning

confidence: 99%

Diel activity cycles of freshwater gastropods under natural light: Patterns and ecological implications

Lombardo

Miccoli

Giustini

et al. 2010

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

-Though much is known about freshwater snail ecology, their circadian rhythms remain poorly investigated. Well-fed, stress-free, mid-size adults of six species common in central Italian lakes were exposed to natural sunlight and photoperiod, and their activity status was recorded at 3-h intervals during a 9-d indoor experiment. All species exhibited evident diurnal habits despite high individual variability, with middayto-early-afternoon activity peaks. Activity was correlated with diel light conditions but not with short-term changes in albedo. The prosobranch Bithynia (= Codiella) leachii and the pulmonates Physa (= Physella) acuta and Planorbis planorbis were the most active species and exhibited the longest-lasting response to daytime food addition. The prosobranch Valvata piscinalis exhibited long periods retracted in its shell with the operculum shut, and the remaining taxa (the pulmonates Galba (= Lymnaea) truncatula and Radix (= Lymnaea) auricularia) exhibited an intermediate degree of activity. P. acuta was the most active species at night and exhibited the quicker response to nighttime food addition. Alertedness to (diurnal) predators may be highest for the highly active P. acuta and P. planorbis, whose antipredator defenses are mainly behavioral. Diel activity patterns and other ecological characteristics suggest that P. acuta may be favored in food-rich habitats, while V. piscinalis may not be able to fully exploit food resources, especially if in limiting quantities. All snail species -and P. acuta in particular -may stimulate periphyton metabolism while keeping its biomass low by grazing mainly during the time of maximum photosynthesis.

show abstract

Littoral invertebrates associated with aquatic plants and bioassessment of ecological status in Lake Bracciano (Central Italy)

Abstract: ABSTRACT

Cited by 22 publications

References 29 publications

Effects of a long term water level reduction on the ecology and water quality in an eastern Mediterranean lake

Effects of a long term water level reduction on the ecology and water quality in an eastern Mediterranean lake

Influence of hydrophyte abundance on the spatial distribution of zooplankton in selected lakes in Greece

Diel activity cycles of freshwater gastropods under natural light: Patterns and ecological implications

Contact Info

Product

Resources

About