Measured premise
01 · PHYSICAL INPUT
FieldState
A configuration, not one generic dose: components, spectrum, geometry, reference and time.
E · B · Q · t
Ecology: FieldState and selection
BERM–Eco distinguishes static, ELF, geomagnetic and RF FieldStates; natural field use, measured anthropogenic response, ecological sorting and evolution remain separate claims.
Figure 1 · Ixodes / host interface
A local electrostatic route to host encounter
This figure separates a reported observation from its mechanism illustration. At the host–vegetation interface, a local static-electric gradient can create an attraction force on a polarizable tick.
Observed result
15 / 20live nymphs fully lifted in the reported apparatus
- Applied potential
- +750 V
- Air gap
- 3 mm
Reported comparison0 / 20 at 0 V · median lift time 0.79 s
Mechanism route isolated in the study
- 01Host + reference geometry
- 02Local EDC / ∇(E²) interface
- 03Tick encounter / attachment
Mechanism illustration
Interpretation. Conceptual reconstruction of a local host–vegetation interface. Geometry and field lines are illustrative, not to scale and not a field measurement.
Evidence provenance
Mechanism and reported lift result: England, Lihou & Robert (2023)i
Image: BERM–Eco illustration; it is not an experimental photograph or a quantitative field map.
MODEL FRAMEWORK
BERM–Eco: measured fields, ecological sorting and selection
The ecology branch tests the same physical premise as the human model: organisms do not encounter one generic “EMF dose”. They encounter a measured field configuration, and each species has its own sensory, morphological and life-stage transfer function. This makes relative ecological outcomes testable without treating every species as uniformly sensitive or resistant.
Causal reading guide
BERM candidate mappings from one measured FieldState
Read this BERM candidate chain from left to right. FieldState supplies the measurement record. The L2 response form is conditional on stated coupling assumptions, while sensing, transport and physiological transfer require species- and stage-specific tissue kernels and calibration. Solid steps summarize measured premises. The amber sequence is the explicitly testable ecological and evolutionary extension.
Measured premiseBERM hypothesis; L2 operator open
Measured premise
02 · SPECIES TRANSFER
Different organisms read it differently
Morphology, sensory organs, size, hydration, life stage and habitat shape the local response.
Rᵢ = Hᵢ(FieldState)
Measured premise
03 · ECOLOGICAL EVENT
Encounter, route or dispersal
The proximal endpoint can be a visit, attachment, navigation choice or colonisation event.
kᵢⱼ
BERM hypothesis; L2 operator open
04 · RELATIVE OUTCOME
Ecological sorting
The relevant contrast is a relative change in realised fitness, not a claim of uniform sensitivity.
Wᵢ / Wⱼ
BERM hypothesis; L2 operator open
05 · GENERATIONAL TEST
Selection / evolution
Only repeated fitness differences acting on inherited variation can change a trait distribution.
P₍g+1₎(θ)
FieldState signature ledger
A FieldState has several non-interchangeable signatures
The ledger prevents category errors: an observation in one field class is not silently reused as evidence in another.
- 01Static interface
- E_DC · Q · ∇|E|²
- force / attachmentphysical transport
- 02ELF waveform
- E_AC(f) · B(f) · dE/dt
- landing / behaviourmatched endpoint
- 03Geomagnetic cue
- B₀ · inclination · light
- orientationcontext-dependent signal
- 04RF signature
- S(f, polarisation, time)
- frequency windowspectrum-specific result
E_DC · Q · ∇|E|²
Static / triboelectric interface
Charge, reference potential, local electric-field gradient, geometry, grounding and humidity govern local transport and attachment. This is the class established in the tick–host work; it is not a proxy for RF or geomagnetism.
E_AC(f) · B(f) · dE/dt
ELF electric and magnetic fields
Time-varying electric and magnetic components must be measured separately, including waveform, polarity, geometry and induced local transfer. A static attachment result cannot be copied into an ELF response claim.
B₀ · inclination · light
Geomagnetic orientation
Background-vector direction and inclination can be information-bearing; reception can also be light-, clock- and developmental-stage-dependent. This branch is distinct from electric-field transport.
S(f, polarization, time)
RF spectrum and temporal structure
Carrier frequency alone is insufficient: spectrum, polarization, modulation, background and exposure geometry can matter. In some avian compass experiments, disruption is frequency-window-specific rather than a generic RF effect.
EVIDENCE SEQUENCE
Four claims, one causal sequence
BERM–Eco gains explanatory power by keeping what has been established distinct from what is next to test. The sequence below is not a downgrade of the hypothesis; it defines the evidence needed to move from mechanism to selection.
OBSERVED
01 · NATURAL FUNCTION
A field can be a biological signal or force
Electric and magnetic fields can guide floral foraging, orientation, dispersal and host encounter in different organisms. This motivates BERM to test vector, geometry and time as physical inputs; FieldState is only the optional measurement branch for recording them.
OBSERVED
02 · MEASURED RESPONSE
BERM tests whether a measured field change alters an endpoint
A matched sham-controlled experiment can establish a component-specific behavioural or physiological response. It does not by itself establish a population trend or a universal species effect.
DERIVED / TESTABLE
03 · ECOLOGICAL SORTING
Different response functions can reorganise encounters
If the same measured physical field condition changes a pollinator, host, parasite, predator or competitor differently, visit, attachment, navigation or dispersal rates can shift relative fitness and community structure. This is a testable BERM consequence; FieldState can record the condition.
DERIVED / TESTABLE
04 · EVOLUTION
Selection requires inherited variation across generations
Ecological sorting becomes evolution only if the fitness difference associated with the measured physical field condition acts repeatedly on a heritable trait and changes its distribution. Abundance alone is not an evolutionary result.
INTERFACE
The static triboelectric interface
This is a native BERM FieldState branch: the host, air gap, vegetation, textile and tick can form a local static-electric interface. It joins reproductive or ecological states only through a measured local transfer; it is not a shortcut from a material name or a country proxy to an outcome.
Organism systemsPollinator · tick / parasite · migrant · disperser
SENTINEL SYSTEMS
High-information BERM–Eco sentinel systems
These systems are valuable because each joins a measured field feature to a proximate biological endpoint. They are not interchangeable dose models and do not supply a direct human TFR coefficient.
POLLINATORS
Pollinator networks
Bumblebees and honeybees can use floral electric cues. Field experiments with anthropogenic electric fields make floral landing and visit networks a direct test bed for species-specific response functions.
HOST–PARASITE
Ticks, mites and host encounter
Ixodes attraction, flower-mite transport and parasite attachment make encounter rate a measurable intermediate. A tick’s electrostatic competence is not evidence of RF/ELF immunity; robustness must be shown field-class by field-class.
NAVIGATION
Migration and orientation
Cryptochrome-dependent and avian compass systems show why background vector, light and narrow frequency windows deserve explicit measurement. The endpoint can be route choice or return, not necessarily mortality.
DISPERSAL
Dispersal and colonisation
Electric-field-elicited spider ballooning demonstrates a physical route from local field geometry to dispersal. Repeated changes in dispersal can reshape colonisation, gene flow and metapopulation structure.
MEASUREMENT CHAIN
From a historical reading to a measurable FieldState
The active model retains historical textile findings, but upgrades their physics. The relevant object is not ‘polyester’ by itself: it is a time-varying, referenced interface state {Q, V, E(r,t), ∇E², dE/dt, τ} shaped by material, body and environment. It also keeps DC interface transport separate from low-frequency waveform and polarity cues.
V/cm²
Historically reported V/cm², not a tissue-field unit
Shafik’s V/cm² is a physically underdetermined historical meter reading. It preserves the observed polyester > blend > cotton ordering in that setup, but cannot be converted into charge, V/m or intragonadal field without the probe area, stand-off, calibration and earth/body reference.
Q · E · dE/dt
The measurement chain
A reconstruction measures net charge with a Faraday cup, potential relative to a named reference, a local vector E(r,t) map, and its temporal change during motion, rest and contact separation. It also records reference-electrode identity, ground-path impedance, capacitance to reference, and probe orientation/bandwidth/input impedance. Geometry and grounding are inputs, not afterthoughts.
τ
Charge retention is an empirical time function
In a simple fit Q(t)=Q₀e⁻ᵗ⁄ᵗᵃᵘ, but real textile interfaces can have fast and slow decay components. Under one reported textile test, untreated PET had a charge-decay half-life over 2,000 s, while antistatic treatments shortened half-life to fractions of a second through seconds.
Dincmen, Hauser & Gursoy 2016i
RH · motion · ground
Movement, humidity, blend and grounding set the state
Motion raises charge-generation events; resting exposes retention and leakage. Relative humidity, skin moisture, fibre fraction/finish, air gap, pressure, footwear–floor impedance and antistatic treatment alter Q, E and dE/dt. In a checked fixture, τRC≈Rleak·Ceff is a useful comparator; the measured interface decay remains empirical. These are FieldState modulators, not generic covariates.
∇E²
The same geometry connects the textile and tick branches
For a small polarizable tick, electrostatic attraction force scales with the local gradient ∇(E²), not simply the sign of a distant voltage. England et al. modelled host–vegetation hotspots exceeding 300 kV/m in their stated geometry; the comparable quantity for a textile interface is a measured local map, not a guessed conversion.
E_DC · E(f)
Transport and sensing are separate transfer functions
The tick experiment demonstrates polarity-independent induced transport. Varroa showed charge-sign-dependent behaviour; flower mites combined a modulated cue with static transport; honeybee landings differed under 50 Hz AC and positive DC. BERM records these as component-specific transfers, not one generic ‘electric sensitivity’ trait.
ε′ · ε″ · σ(f) · τ
Morphology is a measurable transfer function, not a shield label
A waxy cuticle may alter charge leakage and retention, while dielectric polarizability governs induced attraction; the two need not move in the same direction. The discriminating species/stage measurements are permittivity and loss, conductivity, Q-decay, cuticle thickness/shape, mass, tarsal adhesion and hair/tarsus mechanics.
BIOLOGICAL COUPLING
Where the interface joins the existing BERM biology
STATIC_TRIBO_INTERFACE is a physical source node. It does not add a fertility coefficient. Its candidate transfer routes reuse the model’s existing organ-specific states, each of which still needs its own local measurement and endpoint mapping.
01
Local bioelectric transfer → Vmem / Ca²⁺–redox
The measured interface field, geometry and transient pattern are the native inputs for a local membrane-potential and Ca²⁺/mitochondrial-redox transfer. This is the route to VMEM_MTOR and A_VGCC_ROS — not a uniform DC field assumed through the whole organ.
02
Surface sensory transfer → HPA–HPG → steroidogenesis
The model keeps skin/hair/interface sensing and autonomic context as an explicit route into HPA_HPG. Downstream, the existing male steroidogenesis, ovulatory clock and implantation nodes remain distinct rather than collapsing into one endocrine multiplier.
03
Redox / Vmem memory → BTB and ovarian reserve
The static branch can only reach blood–testis-barrier, germline reserve or ovarian reserve through the already registered A_VGCC_ROS, VMEM_MTOR and developmental-memory states. It does not turn the shared textile observation into a global barrier or female-capacity claim.
EVIDENCE STATUS
What is directly established, and what remains a hypothesis
DIRECT PHYSICAL EVIDENCE
Static fields can pull ticks across a short air gap
Controlled experiments with Ixodes ricinus nymphs showed passive attraction toward electrostatically charged host materials across short air gaps. The reported polarity independence is consistent with induced polarization in the tick rather than a required fixed tick charge.
DIRECT PHYSICAL CONTEXT
Host–vegetation geometry matters
The same work modelled charged hosts near vegetation and tested a host-like electrostatic configuration. It supports a local host–vegetation gradient as a physical interface worth measuring; it is not a population ecology estimate.
DIRECT RF PHYSIOLOGY
The same tick has a separate RF-physiology response
In a controlled 900 MHz experiment, Ixodes ricinus synganglia showed sex-, intensity- and time-dependent neuropeptide/receptor transcript changes. This places tick RF physiology in its own component-specific branch; it does not replace the static-contact mechanism.
Šofranková et al. 2023i
MODEL-DERIVED HYPOTHESIS
Differential interface sensitivity may be selectable
If species, life stages or host–vegetation settings differ in attachment probability under the same calibrated static field, and that difference changes realized feeding or reproduction, differential selection becomes testable. That evolutionary chain has not yet been demonstrated for this interface.
INTERPRETATION
What the static-contact evidence establishes
- •The formal tick experiments were performed with I. ricinus nymphs. They establish a static electrostatic attraction mechanism in that experimental system, not a universal threshold for all ticks or ectoparasites.
- •Triboelectric charging is relevant here because contact and friction among materials can generate static charge. The study used rabbit fur/feet and charged acrylic as experimental materials; it does not establish one fixed charge profile for every host, coat, habitat or weather condition.
- •Electric ecology provides useful physical context for organism–environment interactions, but ecological abundance, host contact and disease risk remain multi-causal outcomes.
DERIVED PREDICTIONS
Testable ecology and evolution hypotheses
The ecological result is relative: a species can become more common because its fitness under the measured physical field condition declines less than that of a competitor, host, prey or predator. These are BERM-derived research predictions.
Δ log(Nᵢ/Nⱼ) = log Wᵢ(FieldState, EcoContext) − log Wⱼ(FieldState, EcoContext)
Ecological sorting becomes evolutionary change only when interface, sensory or recovery traits vary heritably and the fitness difference associated with the measured physical field condition persists across generations. BERM therefore registers a separate time-indexed trait-distribution state rather than treating a single abundance contrast as evolution.
P₍g+1₎(θ) ∝ W(θ | FieldState, EcoContext) · P₍g₎(θ)
ECO–S1
Species- and stage-specific attachment curves
Under the same calibrated static-gradient series, estimate attraction and attachment curves separately for species and life stages. A shared curve is not assumed.
ECO–S2
Interface dependence
If the physical mechanism is relevant, attraction should change with host-surface charge, vegetation/grounding geometry, air gap and humidity in directions predicted by the measured electrostatic configuration.
ECO–S3
Selection requires a fitness link
A selection claim requires more than an attachment contrast: the contrast must predict feeding success, survival or reproduction across generations, with genotype or heritable phenotype measured independently.
DERIVED PREDICTIONS
EMF as a Novel Evolutionary Selection Pressure
A changed local environment can alter encounters and functional output before abundance changes. BERM models each species’ receiving state and its interactions with partners, food and parasites. Ecological sorting and heritable selection are different outcomes; the latter needs fitness and inheritance measurements.
The honeybee–Varroa hypothesis tests both sides: food return, grooming and colony renewal in bees; encounter, attachment, feeding and reproduction in mites. Reduced host defense can amplify parasitism, while host loss can constrain parasite recruitment. Neither protection by a small body nor immunity from a hard cuticle is assumed.
Fitness change →
EM sensitivity →
Varroa
Ixodes
Human
Moth
Bat
Honeybee
Bird
Species positions are BERM-Eco estimates [H] based on candidate mechanisms, not quantitative fitness measurements. The scatter illustrates a BERM hypothesis about a changed physical field environment; FieldState would only record that environment.
RESEARCH DESIGN
Minimal discriminating study design
MINIMUM PROTOCOL
- 1.Measure surface potential or local static field, geometry, separation distance, material, grounding state, temperature and relative humidity for every trial.
- 2.Randomise and blind attachment scoring where feasible; include uncharged/sham configurations and controls for odour, CO₂, heat, vibration and direct contact.
- 3.Sample multiple taxa and life stages instead of extrapolating from one nymphal dataset.
- 4.For an evolutionary result, pair field/attachment phenotypes with host-use, survival or reproduction data and a pre-specified heritability or genotype analysis.
Field-class rule
Static electrostatic attraction and time-varying RF/ELF exposure are different FieldState components. BERM keeps their transfer functions separate instead of copying a response from one field class to another.
Tick electrostatic competence is a directly testable contact mechanism. RF/ELF response is a separate, species-specific transfer question whose answer must come from a matched exposure and endpoint measurement.
SOURCES AND PROVENANCE
Primary sources and context
Controlled I. ricinus electrostatic-attraction experiments and host–vegetation field modelling.
Review of electric ecology and electroreception; broad context, not a tick-population effect estimate.
Controlled 900 MHz exposure and neuropeptide/receptor transcript response in I. ricinus synganglia: a separate RF physiology branch.
Human textile–skin measurements showing a material-dependent historical interface reading; it supplies a relative signal, not an organ-field conversion.
Controlled PET antistatic-treatment and charge-decay measurements, including a large change in charge-retention time.
Charge-sensitive behaviour in Varroa jacobsoni as named in the original study — now generally understood as V. destructor in this Apis mellifera pest context; an ectoparasite-contact anchor, not a colony-collapse estimate.
A component- and polarity-specific anthropogenic electric-field effect on honeybee floral landing in a paired field experiment.
Flower-mite electroreception and electrostatic host transport: an ecological life-cycle mechanism in another mite guild.
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Predictions