Ecology, BNG and Protected Species – Page 2
Ecology surveys, biodiversity net gain, protected species licences and survey seasons.
Ecology, BNG and Protected Species articles – page 2
151 articlesInvasive species on site and what the law requires
Having Japanese knotweed is not unlawful. Causing it to grow in the wild and moving contaminated soil are both controlled, and treatment programmes are measured in growing seasons rather than weeks.
Priority habitats and species in a planning decision
Priority habitat is a material consideration rather than a designation. The weight comes from sections 40 and 41 of the 2006 Act and the biodiversity policies of the Framework.
Disputing a condition score with the council ecologist
Moderate or poor on two hectares changes the baseline by enough units to decide whether a scheme delivers on site. The argument is won on criteria sheets, survey dates and photographs.
Hedgerow units and the rules you cannot trade around
Area habitat units cannot compensate for lost hedgerow. How hedgerow types and condition are scored, what the trading rules allow, and where layouts go wrong.
Timing vegetation clearance around the bird nesting season
The Wildlife and Countryside Act protects a nest while it is in use, whatever the date. How to check, supervise, record and programme site clearance.
What a negative preliminary roost assessment really means
Only a negligible suitability result with no evidence found closes the bat question. Low, moderate and high all trigger emergence surveys in a season that closes in September.
Hedgehog gaps and connectivity conditions
Connectivity conditions fail at handover, not at construction. The fix is in the gravel board detail, the estate management plan and the homeowner pack.
Reviewing another consultant's ecology report
A technical review checks survey effort against published guidance, tests whether the conclusions follow from the data, and asks whether the mitigation could be built and licensed.
Protected species and the demolition method statement
A demolition method statement is a construction document. It has to be followed by a foreman, not read by an ecologist, and it has to leave a record behind.
Soil translocation and habitat creation on stripped ground
Grassland creation usually fails on soil, not seed. Nutrient stripping, careful translocation and a specification a contractor can price are what make the units deliverable.
Hedgerow units and the Hedgerows Regulations overlap
The biodiversity metric asks what a hedge is worth in units. The Hedgerows Regulations 1997 ask whether it may be removed at all. The two regimes often give different answers.
Otter surveys and working windows on a watercourse
Otter resting places are protected whether the animal is present or not, so a holt in the working corridor is a constraint from day one rather than a site issue.
Green roofs in the metric: substrate depth and scoring
A green roof earns biodiversity units only if it is built as habitat. Substrate depth and variation decide the condition score, and the structure has to carry it.
Ponds created for net gain and why they fail condition
Created ponds are the habitat most likely to be claimed for biodiversity net gain and the least likely to reach the condition assumed. The conflict with attenuation function is usually the cause.
Lighting design for bats and the lux limits that matter
Bat lighting limits are only enforceable if the plane, the point and the maintained condition are stated. What to specify, what to model and what to verify after installation.
Roost compensation: bat boxes against integrated features
A mitigation licence asks for compensation matching the species, roost type, thermal conditions and access being lost. That is where external boxes usually fall short.
Static bat detectors: deployment and data interpretation
Static detectors answer activity questions, not roost questions. Deployment records, classifier limits, verification protocols and the lighting design the data should inform.
When an ecological impact assessment replaces an appraisal
An appraisal describes constraints. An assessment values features, characterises impacts and concludes on significance. Here are the triggers that move a project from one to the other.
Out of season ecology surveys and what officers accept
A survey outside its season is an absence of evidence. Here are the windows that matter, when assuming presence is defensible, and what a case officer needs in writing if you submit without the survey.
Nutrient neutrality: what a scheme has to demonstrate
Nutrient neutrality means showing a scheme adds no net nitrogen or phosphorus load. The budget, the mitigation and the securing mechanism are three separate pieces of work, and each has its own traps.
Invasive species on site and the Schedule 9 duty
Having knotweed is not an offence, but causing it to spread is. Here is what Schedule 9 prohibits, how the waste rules bite when soil leaves the site, and what a management plan has to contain.
Water vole displacement and the licence position
Water voles carry full protection under Schedule 5 to the Wildlife and Countryside Act 1981. Displacement works only on short lengths, in narrow windows, and only where the licence position has been settled in writing.
Barn owls in farm buildings: mitigation that works
There is no development licence for disturbing a nesting barn owl, so avoidance and timing carry the whole burden. That changes how a barn conversion is programmed and what the method statement has to say.
Bat survey effort by roost suitability category
The number of bat survey visits your building needs is set by the roost suitability category from the initial assessment. One, two or three visits, in a season that closes in September.
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