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© 2025 Adler & Allan Ltd. All rights reserved.

Your Trusted Partner for Ecological Impact Assessments (EcIA), Compliance, and Mitigation Solutions

Get in touch today to discuss your project.

Simply send us your details below and our expert team will be in touch.

Contact the experts

Minimise adverse ecological impact to aquatic environments

As environmental regulations become more complex, ensuring compliance with statutory requirements and minimising your environmental impact has never been more critical. We specialise in helping organisations protect aquatic ecosystems while meeting all regulatory and statutory obligations.

Our aquatic ecology services include:

Routine and investigative monitoring

Planned seasonal, yearly and/or biennial monitoring of watercourses and riparian habitats, including but not limited to; fish, aquatic macroinvertebrates, diatoms and macrophytes. Response focused investigative surveys to survey for hydrological variables and protected species using Impact Assessments, walkovers and baseline data surveys.

Expert aquatic ecology assessments for healthier waterways

Understand, protect and enhance aquatic ecosystems to minimise adverse impact to the ecology of nearby water bodies.

Our key Services

River Condition Assessments

Fish surveys and rescues

Macroinvertebrate sampling and in-house identification

Ecological Impact Assessment (including fish mortality assessments)

Ecological Clerk of Works

Routine and investigative monitoring

Adhere to regulatory and statutory compliance relating to development and environmental incidents.

Do you want to find out more?

If you would like to learn more about aquatic ecology assessments from Adler & Allan, get in touch today and our expert team will be happy to assist you.

Get in touch

Aquatic Emergencies

We are experienced in dealing with environmental emergencies and disease outbreaks. We can quickly respond to assess the risks to aquatic life, providing pollution impact assessments, fish mortality surveys, and hydrogen peroxide dosing to remediate and restore affected waterbodies in an emergency.

We operate a 24-7 incident response hotline on 0333 600 2424

Ensure regulatory compliance

24/7 incident response hot line

Nationwide response

Post-pollution assessments

We can undertake post-pollution assessments to assess short-term (immediate) impacts through aquatic macroinvertebrate sampling and fish mortality assessments. We can also assess long-term impacts and watercourse recovery by conducting aquatic macroinvertebrate and fish population/community surveys

Fish population surveys and detailed data analysis

Seasonal and post incident fish surveys using electrofishing methods including backpack and boat surveys. Seine netting and fyke netting surveys are also offered. The detailed data sets obtained are analysed using statistical analysis to assess changes in community structure and species abundances.

Fish rescue and removals through electrofishing and netting

Our specialist fisheries ecologists can provide fish rescues and fish removals on a wide range of waterbodies using techniques including seine netting, fyke netting and electrofishing. Planned removals or response rescues can be undertaken to limit the stress and damage to fish populations during pollution incidents and planned watercourse work, whilst following regulator guidelines and permits. We will liaise with the regulator and obtain all relevant permits before undertaking works.

Sampling, analysis, and interpretation of macro-invertebrate samples using WHPT scoring and other metrics

We have a team dedicated to complete macroinvertebrate sampling in response to pollution events or part of long-term monitoring programmes, using standardised three-minute kick / sweep sampling. We have two UK labs in operation in the UK, and accredited staff to analyse aquatic macroinvertebrate samples. Our analysts use specialised metrics including the Whalley, Hawkes, Paisley & Trigg (WHPT) scoring systems to produce high level ecological reports following macroinvertebrate sampling.

Classification of macro-invertebrate samples using RICT

Using the River Invertebrate Classification Tool (RICT), we offer full or indicative Water Framework Directive (WFD) classifications of watercourses using macroinvertebrate data collected from tailored surveys.

Why choose Adler & Allan?

22 years of providing water and ecology solutions

A dedicated team of over 200 UK wide consultants

Experts in the Environment Agency’s Common Instant Classification Scheme

An understanding of interactions between aquatic ecosystems and anthropogenic activities

Our ecologists are well versed in key legislation to ensure you remain compliant. Relevant legislation includes:

  • Wildlife and Countryside Act 1981
  • The Conservation of Habitats and Species Regulations 2017
  • Hedgerows Regulation 1997
  • Fisheries Act 2020
  • The Water Environment (Water Framework Directive) (England and Wales) Regulations 2017

Accreditations

  • Freshwater Biological Association accredited staff undertake macroinvertebrate identification 
  • Raya level 2 powerboat certified
  • CSCS
  • Institute of Fisheries Management (IFM) certified to electrofish
  • River Condition Assessment accreditation

Do you want to find out more?

If you would like to learn more about aquatic ecology assessments from Adler & Allan, get in touch today and our expert team will be happy to assist you.

Get in touch
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