Habitat Heterogeneity, Coexistence and Habitat Utilization in Five Backswimmer Species (<i>Notonecta</i> spp.; Hemiptera, Notonectidae)

Svensson, Bo G.; Tallmark, Bo; Petersson, Erik

doi:10.1076/0165-0424(200004)22:2;1-p;ft081

Cited by 13 publications

(18 citation statements)

References 13 publications

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“…Corixa punctata is mostly univoltine, but a second generation was observed by Papa´cˇek and Bohoneˇk (1989). According to Svensson et al (2000), Notonecta maculata has one generation per year in Sweden, with adult emergence in August (compared with two generations per year and emergence from May to July in this study). Acilius sulcatus grew from February to June in pond 2 (this study), but from May to June in Wisconsin, USA (Hilsenhoff, 1993).…”

Section: Discussionmentioning

confidence: 75%

“…Broader conservation strategies should therefore ensure that such currently common organisms do not become the endangered species of the future (Rustigian et al, 2003). Ponds also provide useful models for studying how life-history patterns enable many populations to utilize small ecosystems, temporal segregation and/or differences in the size of coexisting nymphs certainly reducing interspecific competition for food and habitat resources (Svensson et al, 2000;Cayrou and Ce´re´ghino, 2003). Subsequently, interesting ideas and/or alternative strategies can be derived for conservation planning.…”

Section: Discussionmentioning

confidence: 99%

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Life‐cycle phenology of some aquatic insects: implications for pond conservation

Cayrou

Céréghino

2005

Aquatic Conservation

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ABSTRACT1. Life-cycles and growth patterns were determined for 21 dominant aquatic insect species in small permanent ponds in an arid, karstic region (SW France, site fr7300909 of the Natura 2000 conservation network). The species studied are widely distributed throughout Europe, but some life-cycle patterns are reported here for the first time.2. The life-history patterns of the 21 species can be divided into five main types: (i) a semivoltine cycle spreading over 2 years; (ii) slow univoltine cycles; (iii) fast univoltine cycles; (iv) multivoltine life-cycles with a long winter generation and two or three summer generations per year; and (v) bivoltine life-cycles with two fast generations per year. Growth was either exponential over the whole developmental period for a given cohort, or divided into two or three successive periods during each of which the growth rate was fairly constant.3. Biodiversity estimates strongly depend on the temporal and spatial scale over which observations are made. Ponds thus provide useful models to show how life-history patterns enable many temporally segregated populations to utilize small ecosystems. Conservation frameworks should therefore carefully consider the time-frame needed to survey ponds, as many species with fast cycles could be overlooked. The spatial scale needed to manage threatened habitats and thus preserve pond networks must be broadened, rather than attempting to target individual water bodies for particular management actions.

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Section: Discussionmentioning

confidence: 75%

Section: Discussionmentioning

confidence: 99%

Life‐cycle phenology of some aquatic insects: implications for pond conservation

Cayrou

Céréghino

2005

Aquatic Conservation

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“…It is well documented that some bug species display distinct habitat preferences (Macan, 1954;Savage 1982Savage , 1994a while others are capable to inhabit a wide range of habitats, from rock pools to more complex habitats such as lakes (Savage, 1989;Kurzatkowska, 1993;Svensson et al, 2000). Some bugs can tolerate environmental conditions that would be lethal to other invertebrate species, Table 3.…”

Section: Discussionmentioning

confidence: 97%

Local and regional factors determining aquatic and semi-aquatic bug (Heteroptera) assemblages in rivers and streams of Greece

Karaouzas

Gritzalis

2006

Hydrobiologia

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Heteroptera species were collected from 48 sites distributed throughout the mainland and island complexes of Greece during 1999Greece during -2004. The aims of this study were to investigate Heteroptera distribution and abundance in Greek streams, identify the environmental factors that are linked to variation in their assemblages and to partition the influence of environmental and spatial components, alone and in combination, on Heteroptera community composition. Canonical ordination techniques (CCA) were used to determine the relationship between environmental variables and species abundance, while variation partitioning was performed using partial CCA to understand the importance of different explanatory variables in Heteroptera variation. Heteroptera variation was decomposed into independent and joint effects of local (physicochemical variables, microhabitat composition, stream width and depth), regional (land use/cover) and geographic variables (longitude, latitude, altitude and distance to source). Land use/cover, aquatic and riparian vegetation, stream size and water chemistry were the most important factors structuring Heteroptera assemblages. At regional scale, bug assemblages were mainly divided into those found in forested and agricultural landscapes, following water quality and microhabitat composition at local scale. Local variables accounted for 48% of the total explained variation, regional variables for 20% whereas geographical position appeared to be the least influencing factor (8.5%). The results of partial constraint analyses suggested that local variables play a major role in Heteroptera variation followed by regional variables.

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“…Given the elusive identity of the contaminants whose combined effects are under scrutiny, we proposed an investigation in which community structure was studied in relation to high-impact land cover associated with elevated levels of pesticide use, such as commercial agriculture and chemically treated lawns. In addition to watershed land cover, six other environmental variables recognized in the literature as drivers of aquatic hemipteran assemblages were measured: fish abundance, macrophyte abundance, conductivity, pond age, water depth, and surface area (e.g., Briers & Warren, 2000;Svensson et al, 2000). Multivariate techniques were used to test the relationships between environmental variables and hemipteran community structure, and to examine the co-occurrence tendencies of the species in this system.…”

Section: )mentioning

confidence: 99%

Aquatic Hemiptera community structure in stormwater retention ponds: a watershed land cover approach

Foltz

Dodson

2008

Hydrobiologia

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Stormwater ponds are increasingly common aquatic habitats whose biotic communities are largely unexplored. As anthropogenic development continues to alter the landscape, watershed land use is gaining recognition for its potential to predict species compositions in aquatic systems. This study reports species composition of five aquatic hemipteran families (Notonectidae, Corixidae, Belostomatidae, Nepidae, Pleidae) in 28 permanent, artificial stormwater ponds in watersheds with different land covers and associated contaminant input. We hypothesized that land cover variables would be significant drivers of aquatic hemipteran community structure in ponds, and that ponds with a high percentage of agricultural and lawn cover in the watershed would be characterized by the absence of species intolerant of the chemical, physical, and ultimately biotic changes associated with these watersheds. Non-metric multi-dimensional scaling (NMS) was used to identify dominant gradients of species composition and environmental variables. Pond morphology variables, watershed lawn, watershed agriculture, and predatory fish abundance were each found to have statistically significant correlations with hemipteran community structure. The abundance of Notonecta undulata, the species responsible for creating the largest (ranked) distance in species structure among ponds, was positively correlated with shallow, fishless ponds and independent of land use variables. The abundances of four species of corixids were negatively correlated with watershed agriculture, and hemipteran richness was positively correlated with watershed lawn and negatively correlated with pond surface area. Heirarchical cluster analysis revealed non-random hemipteran species assemblages in which congeneric corixid species tended to co-occur, contradicting traditional niche theory. Since artificial stormwater ponds are chemically different from natural-pond habitat and rapidly increasing in number, knowledge of which insect species are capable of thriving in this environment and their relationship to land use in the watershed is of both environmental and evolutionary interest.

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Habitat Heterogeneity, Coexistence and Habitat Utilization in Five Backswimmer Species (Notonecta spp.; Hemiptera, Notonectidae)

Cited by 13 publications

References 13 publications

Life‐cycle phenology of some aquatic insects: implications for pond conservation

Life‐cycle phenology of some aquatic insects: implications for pond conservation

Local and regional factors determining aquatic and semi-aquatic bug (Heteroptera) assemblages in rivers and streams of Greece

Aquatic Hemiptera community structure in stormwater retention ponds: a watershed land cover approach

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