Koen Lock

Koen Lock
Ghent University | UGhent · Department of Applied Ecology and Environmental Biology

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163
Publications
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Introduction
Skills and Expertise

Publications

Publications (163)
Article
Full-text available
Riparian forest buffers have multiple benefits for biodiversity and ecosystem services in both freshwater and terrestrial habitats but are rarely implemented in water ecosystem management, partly reflecting the lack of information on the effectiveness of this measure. In this context, social learning is valuable to inform stakeholders of the effica...
Article
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Batrachochytrium dendrobatidis is responsible for amphibian declines worldwide. Decreasing the aquatic density of this chytrid through consumption of its infectious zoospores by Cladocera (water fleas) may mitigate the impact of chytridiomycosis. Understanding this predator-prey relationship requires insights in the zoospore ingestion rate of an av...
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Adequate environmental management in tropical aquatic ecosystems is imperative. Given the lack of knowledge about functional diversity and bioassessment programs, management is missing the needed evidence on pollution and its effect on biodiversity and functional ecology. Therefore, we investigated the composition and distribution of the macroinver...
Article
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Alle Taxa Biodiversiteit Inventarisatie en 30 jaar natuurbeheer
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The fig psyllid Homotoma ficus (Linnaeus, 1758) (Psylloidea, Homotomidae) is reported for the first time from Belgium, where it has recently been observed at two localities. It is a Mediterranean species monophagously living on fig (Ficus carica L.). Fig plants are not of economic importance in Belgium and H. ficus seems to cause only limited damag...
Article
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Machilis germanica Janetschek, 1953 could finally be confirmed for the Belgian fauna. Its presence was expected due to its occurrence just across the border in the Dutch part of the Montagne Saint-Pierre. On previous targeted searches, however, this species was not found in Belgium. That's why the record on 14.vi.2019 still came as a surprise. The...
Article
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The Rwenzori region in Uganda, a global biodiversity hotspot, is currently undergoing exponential economic and population growth, which puts continuous stress on its freshwater ecosystems. In Sub-Saharan Africa, biomonitoring campaigns using region-specific biotic indices is limited, particularly in Uganda. In this research, we present the Rwenzori...
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Patches of riparian woody vegetation potentially help mitigate environmental impacts of agriculture and safeguard biodiversity. We investigated the effects of riparian forest on invertebrate diversity in coupled stream-riparian networks using a case study in the Zwalm river basin (Flanders, Belgium). Agriculture is one of the main pressures in the...
Article
Patches of riparian woody vegetation potentially help mitigate environmental impacts of agriculture and safeguard biodiversity. We investigated the effects of riparian forest on invertebrate diversity in coupled stream-riparian networks using a case study in the Zwalm river basin (Flanders, Belgium). Agriculture is one of the main pressures in the...
Article
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A lectotype (male) and paralectotypes (male, female) of Pneumia vittata (Tonnoir, 1919) comb. nov. (= Pericoma crispi Freeman, 1953 syn. nov.) from Belgium are designated. The species is redescribed and illustrated, and a diff erential diagnosis is given. The former designation of a holotype, paratypes and paratypoids by Jung is invalid because it...
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The Sub-Saharan alpine freshwater biodiversity is currently impacted by human settlements, climate change, agriculture, and mining activities. Because of the limited biodiversity studies in the region, a better understanding is needed of the important environmental variables affecting macroinvertebrate assemblages. In this paper, macroinvertebrate...
Article
Food production often leads to environmental degradation. Consequently, insights into ecosystem functioning in relation to exploitation are needed as a basis for socioeconomically acceptable mitigation of these impacts. A Bayesian Belief Network (BBN) model is developed to link three major ecosystem services (ES), i.e. food production , water provi...
Article
The growth of urbanization worldwide has contributed to the deterioration of the ecological status of water bodies. Efforts at improving the ecological status have been made either in isolated form or by means of integrated measures by stakeholders, but in many cases, these measures have not been evaluated to determine their benefit. In this study,...
Article
Recent studies on water quality in tropical rivers indicate substantial differences between seasons. However, investigations on the needs and added value of season-specific models are lacking. Thus, this paper aims to determine the accuracy and relevance of season-specific and season-overarching models to predict biological water quality. Additiona...
Presentation
Efforts to improve the ecological status of water bodies in urbanized areas worldwide have been made either in isolated form or by means of integrated measures. In this study, we implemented a scenario analysis to restore the ecological water quality in the Cuenca River (Ecuador). For this analysis, an integrated urban wastewater system model was l...
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Red Lists estimate the extinction risk of species at global or regional levels and areimportant instruments in conservation policies. Global Red List assessments are readilyavailable via the IUCN website (https://www.iucnredlist.org) and are regularly updated by(taxonomic) experts. Regional Red Lists, however, are not always easy to find and oftenu...
Article
The Rwenzori Mountains and Albertine Rift region of southwestern Uganda are part of a globally recognized biodiversity hotspot, but are currently facing pressures from intensified agriculture, mineral exploitation and hydroelectric power generation. This study was undertaken to assess the ecological water quality of Rwenzori rivers using biomonitor...
Article
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Several thousand specimens conserved in ethanol belonging to 33 species were found at two Belgian localities: Ottignies and Wanze, two sites in the transition zone of the Atlantic to the Central European faunal zones. 12 species are classified as new for this country: Jungiella (Jungiella) hygrophila Ježek, 1987, Panimerus denticulatus Krek, 1971,...
Article
Performing biological assessments of freshwater systems is crucial in most tropical rivers as the lack of in-depth knowledge about functional diversity inhibits the design of appropriate water management and restoration plans. Therefore, in this paper, we investigated the presence and evolution of the functional diversity of the macroinvertebrate c...
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The Guayas River basin is one of the most important water resources in Ecuador, but the expansion of human activities has led to a degraded water quality. The purpose of this study was (1) to explore the importance of physical-chemical variables in structuring the macroinvertebrate communities and (2) to determine if the thresholds in stream veloci...
Article
Extensive anthropogenic activities including land conversion have been taking place in the Guayas river basin (Ecuador) due to increasing population growth. Land use changes are considered one of the key sources affecting the ecological water quality of the Guayas river basin. Therefore, we investigated the effect of land use on the ecological wate...
Article
We evaluated the biological water quality in relation to chemicals discharged through sewage outfall during both dry and rainy season. The lowland area of the Cuenca River basin in the southern Andes of Ecuador, including the city of Cuenca, constituted the study area. To perform an integrated water quality assessment, data were collected of macroi...
Data
https://www.gbif.org/dataset/37e094f3-dcf2-469f-93a2-c4b9b5fa7275 Waarnemingen.be - Hemiptera occurrences in Flanders and the Brussels Capital Region, Belgium is a species occurrence dataset published by Natuurpunt. The dataset contains over 59,000 Hemiptera occurrences of 789 naturally occurring species (native, vagrant or migrant species), record...
Article
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On 16.IX.2017, Trimerocaecilius becheti (Psocoptera) was observed for the first time in Belgium in Parc Tivoli in Mechelen. Trimerocaecilius becheti lives on bark of trees and bushes covered with lichens. It is a Mediterranean species that has been reported from Romania, Israel, Cyprus, Greece and Italy (LIENHARD, 1998), but more recently also in S...
Article
Aquatic macroinvertebrates, 18 physical-chemical water characteristics and 30 hydromorphological variables were assessed at 85 locations on Leyte island, Philippines. Biological traits derived from literature were linked to the biological samples based on four different trait estimation methods. These data were used to determine the relation with r...
Data
https://www.gbif.org/dataset/958b1d2f-2d11-4e94-a828-c8e2d2c013ca Waarnemingen.be - Orthoptera occurrences in Flanders and the Brussels Capital Region, Belgium is a species occurrence dataset published by Natuurpunt. The dataset contains over 90,000 Orthoptera occurrences of 41 naturally occurring species (native, vagrant or migrant species), reco...
Article
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During a pitfall sampling campaign in some heathland relicts in the vicinity of the city of Bruges (West Flanders), the centipede Geophilus easoni Arthur et al., 2001 was found at several locations. These are the first records of this species in Belgium.
Article
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Limnephilus ignavus McLachlan, 1865 had not been observed since the forties in Flanders (Brussels-Capital Region included). On 27.X.2016, one male was captured with a light trap in the botanical garden Jean Massart in Auderghem (Brussels-Capital Region), close to the location where also the historical observations took place.
Article
This study aims to assess the macroinvertebrate communities, diversity and ecological quality (expressed as BMWP-Viet) of rivers on a tropical island. Environmental factors associated with macroinvertebrate communities, diversity and ecological quality were identified to assist conservation planning and management. Biological (macroinvertebrates),...
Article
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The Portoviejo River, located in the central western part of Ecuador, has been heavily impacted by damming, intensive agriculture and untreated wastewater discharge. Unfortunately, detailed information on the water quality and the ecological status of the Portoviejo River is not available, inhibiting decision-making and the development of water man...
Article
Water quality modelling is an effective tool to investigate, describe and predict the ecological state of an aquatic ecosystem. Various environmental variables may simultaneously affect water quality. Appropriate selection of a limited number of key-variables facilitates cost-effective management of water resources. This paper aims to determine (an...
Article
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The biotic integrity of the Guayas River basin in Ecuador is at environmental risk due to extensive anthropogenic activities. We investigated the potential impacts of hydromorphological and chemical variables on biotic integrity using macroinvertebrate-based bioassessments. The bioassessment methods utilized included the Biological Monitoring Worki...
Article
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An updated checklist of the water mites occurring in Belgium is presented here. In total, 177 species have been reported from Belgium, 36 of these are mentioned here for the first time for the Belgian fauna. However, 266 species have already been found in the Netherlands, indicating that a lot more species can be expected. Een geactualiseerde soort...
Article
Six species of Orthoptera are reported as new to the Portuguese fauna: Cyrtaspis tuberculata Barranco, 2005, Natula averni (Costa, 1855), Oecanthus dulcisonans Gorochov, 1993, Pteronemobius heydenii (Fischer, 1853), Tetrix bipunctata kraussi Saulcy, 1888 and Stenobothrus grammicus Cazurro, 1888. The first documented records of Stenobothrus bolivari...
Article
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Biological invasions of aquatic macroinvertebrates are gaining interest because of their potential for significant ecological and socio-economic impacts (positive and negative). In the present study, an inventory was made of the alien macroinvertebrates occurring in Flanders (northern Belgium) based on extensive existing collections of biological s...
Article
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Two Psocoptera are reported here for the first time for the Belgian fauna. Pteroxanium kelloggi (Ribaga, 1905) is the first representative of the family Lepidopsocidae in Belgium and the species was observed in Bellem and Nismes. Mesopsocus fuscifrons Meinander, 1966 from the family Mesopsocidae was found in Antwerp and Mechelen.
Article
The Guayas river basin is one of the major watersheds in Ecuador, where increasing human activities are affecting water quality and related ecosystem services. The aims of this study were (1) to assess the ecological water quality based on macroinvertebrate indices and (2) to determine the major environmental variables affecting these macroinverteb...
Article
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Porcellio monticola Lereboullet, 1853 is reported here for the first time in Belgium. The first individuals were captured in Viroinval (Namur) on calcareous grasslands in April 2014. In September 2014, the species was also found on calcareous grassland in Rochefort (Namur). After an extensive field survey in the south of Belgium, the species was fo...
Article
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Red Lists assess the extinction risk of species and are an important tool to prioritise species conservation and management measures. Worldwide, quantitative IUCN criteria are used to estimate the threat status of species at the regional level. In Flanders (north Belgium), about 70.000 distribution records of ladybirds were collected in 36% of all...
Article
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We discuss the results of a Malaisetrap sampling campaign at Schave (Deinze, Oost-Vlaanderen) in the valley of the Zeverenbeek, a former influent of the Leie. Characteristic for this study site are a thick layer of peat, the presence of some seepage areas, a structure-rich vegetation due to grazing and a mosaic of vegetation types. Ten taxonomic sp...
Article
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Worldwide large investments in wastewater treatment are made to improve water quality. However, the impacts of these investments on river water quality are often not quantified. To assess water quality, the European Water Framework Directive (WFD) requests to use an integrated approach. The aim of this study was to develop an integrated ecological...
Article
Stoneflies are macro-invertebrates that are sensitive water quality indicators. Here, their occurrence was modelled based on physical-chemical water characteristics, river morphology and land use with five different modelling techniques. In a case-study in Flanders, stoneflies were found in 219 samples and two sets of absence data were gathered: 21...
Article
The aim of this study was to predict the future distribution of an invasive macroinvertebrate species, Dikerogammarus villosus, under changing environmental conditions. For this, we used an integrated modelling approach. First, a habitat suitability model (HSM) was constructed on the basis of a regression tree model, to determine the preferred chem...
Article
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Macroinvertebrates have been collected by the Flemish Environment Agency (VMM) to assess the ecological water quality in Flanders. Specimens of several families of aquatic Diptera, that were collected between 1997 and 2009, were identified to species level. In this study, two species of Athericidae, four Chaoboridae, five Dixidae, six Sciomyzidae a...
Article
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During the present study an inventory was made of the alien benthic macroinvertebrates occurring in Flanders. To this end collections of biological samples were investigated and supplemented with own sampling campaigns. Three new macroinvertebrate species for Flanders were discovered. In total 72 alien macroinvertebrates were encountered of which 5...
Article
To assess the ecological water quality in Flanders (northern part of Belgium), macroinvertebrates have been collected by the Flemish Environment Agency. During the present study, the blackflies collected between 1997 and 2009 were identified to species level. In total, more than 44,000 specimens were identified, belonging to 12 different species. S...
Article
Full-text available
During the present study an inventory was made of the alien benthic macroinvertebrates occurring in Flanders. To this end collections of biological samples were investigated and supplemented with own sampling campaigns. Three new macroinvertebrate species for Flanders were discovered. In total 72 alien macroinvertebrates were encountered of which 5...
Article
Full-text available
The blackflies of the Netherlands (Diptera: Simuliidae) The checklist of the species from the Netherlands is updated. In total, 19 species are considered to belong to the Dutch fauna. Simulium variegatum is new for the Dutch fauna. A lot of earlier reported species could not be confirmed and were omitted. Identification keys for larvae of the last...
Article
A collection of Norwegian Symphyla has been reviewed. Distributional maps are presented, including older literature records and a previously unpublished material collected by the third author. Seven species have now been recorded from Norway: Hanseniella caldaria (Hansen, 1903), Scolopendrellopsis subnuda (Hansen, 1903), Scutigerella causeyae Miche...
Article
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Samenvatting Sinds de eerste vondst in 1976 is Brachycercus harrisella 8 keer gevonden op 6 locaties in het noordoosten van Vlaanderen. Alle exemplaren waren larven, die van juni tot oktober werden verzameld in laaglandbeken. Deze beken worden gekenmerkt door een trage tot matige stroming en zandige bedding. Meer aandacht voor deze soort is vereist...
Article
To date, approaches in environmental risk assessment (ERA) are based on taxonomy-based descriptions of ecosystems. Due to the widespread occurrence of numerous types of chemicals in the environment and ensuing environmental risks, there is a need to get insight in the relationship between the response of the ecosystem to pollution and the character...
Article
The introduction and the spread of alien invasive species are a worldwide phenomenon causing global ecological and economic damages. Among the invaders, alien macrocrustaceans are known to be very successful invertebrates that colonise new habitats rapidly. Data from different fresh and brackish waters gathered by the Flemish Environment Agency (VM...
Article
When forecasting invasions, models built on a dataset from a certain region often have to be used for simulations in another geographic region. Results on the reliability and usefulness of such models are missing in literature. The present study compares habitat suitability models for the invasive amphipod species Dikerogammarus villosus developed...
Article
Logistic regressions, artificial neural networks, support vector machines, random forests and classification trees were used to predict habitat suitability for mayflies on basis of physical–chemical water characteristics, dominant land use type and structural parameters. As a case-study, the dataset of Flanders was used, which consisted of 4289 sam...
Article
sanabria & lock ‒ ecclisopteryx dalecarlica in nederland en belgie 83 inleiding Ecclisopteryx dalecarlica (Kolenati, 1848) is een ko-kerjuffer uit de familie Limnephilidae. Wereldwijd zijn ongeveer 900 soorten Limnephilidae beschre-ven. Het genus Ecclisopteryx behoort tot de onder-familie van de Drusinae. Deze subfamilie is be-perkt tot de Palearct...
Article
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The Gilgel Gibe reservoir, which was built to fulfill the energy demand and the electricity export ambitions of Ethiopia, was characterized by low macroinvertebrate diversity mainly due to water level fluctuations, trampling of the littoral zone by cattle, nutrient input, and siltation from the catchment flow. The downstream river system was also a...
Article
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Macroinvertebrates have been collected in Flanders since 1989 by the Flemish Environment Agency to assess ecological water quality. During the present study, the collected waterbugs were identified to species level. In total, more than 90 000 waterbugs were identified, belonging to 45 species. Two of these are recent additions to Flemish fauna: Sig...
Article
The free ion approach has been previously used to calculate critical limit concentrations for soil metals based on point estimates of toxicity. Here, the approach was applied to dose-response data for copper effects on seven biological endpoints in each of 19 European soils. The approach was applied using the concept of an effective dose, comprisin...
Article
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During the last decades, the Flemish Gerromorpha and Nepomorpha have been studied intensively. All the material sampled since 1989 by the Flemish Environment Agency for the monitoring of the ecological water quality has now been identified, which resulted in a lot of new data, especially for watercourses. On the other hand, stagnant waters were inv...
Article
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1. Water quality monitoring data from 10 watercourses and laboratory mesocosm studies were used to assess the potential impacts of the crustacean amphipod invader Dikerogammarus villosus on resident macroinvertebrate assemblage structure in Central European fresh waters. 2. The presence of D. villosus was associated with a decline in the prevalence...
Article
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To assess the ecological water quality in Flanders, macroinvertebrates have been collected by the Flemish Environment Agency (VMM). During the present study, larvae of soldier flies collected between 1997 and 2009 were identified to species level. In total, 722 specimens were identified, belonging to 18 different species. Oxycera meigenii Staege...
Article
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Historically, Neuroptera received a lot of attention in Belgium by entomologists such as WESMAEL, DE SELYS-LONGCHAMPS, LAMEERE and NAVAS. However, since more than a century, no updated checklist has been published. Recently, only the family Chrysopidae has been studied, while the other families belonging to the Neuroptera hardly received any attent...