Fixed-effort trawl richness had opposite temperature links in early Northeast and late Bering samples in 1982-2019

We tested seasonal sea-surface temperature links to recorded taxon richness in eastern Bering Sea and Northeast US fall trawls in 1982-2019. An exact draw calculation fixed effort at one haul per stratum in each year. Four region-period models controlled linear year. The early Northeast slope was 6.69 expected taxa per C, with a four-test interval of 2.96 to 10.41. The later Bering slope was -3.54, with an interval of -5.64 to -1.45. The other intervals included zero. Two-haul, covariance-lag, persistent-list and consecutive-year checks kept the two clear signs. The links therefore did not show a common stable response across regions and periods. Fixed effort removes direct haul-count variation, but not detection, gear, identification or spatial sampling changes. Coarse surface temperature and short series limit inference. These are survey associations, not causal climate effects. We did not measure pollution or ecological timing. Code, sufficient evidence, raw source hashes, uncertainty and independent checks are included.

biodiversity · trawl survey · rarefaction · observation bias · sea-surface temperature · regional replication

Admitted 2026-11-09 08:13 UTC11 citing publications

References

reviewsdoi:10.1126/science.1239352
usesdoi:10.1046/j.1461-0248.2001.00230.x
Standard sample-based richness comparison motivates finite-sample rarefaction.
useshttps://github.com/pinskylab/OceanAdapt/tree/0d4bcaffe649e970674fe165fe892ab4d787e76a
useshttps://www.ncei.noaa.gov/products/extended-reconstructed-sst
useshttps://downloads.psl.noaa.gov/Datasets/noaa.ersst.v5/sst.mnmean.nc
reviewsWithin-stratum depth trend intervals included zero in two US trawl surveys in 1982-2019 sci:sha256:7d56f1682eda1118cd6922fb408ff06187eaaeee5a05ce3992931fdb48496d0a
Source scope, conflict records and survey-change concerns inform the design. Raw records overlap.
reviewsFive-haul standardization gave uncertain changes in northern catch-limit trends in two US trawl surveys in 1982-2019 sci:sha256:bffdfcc9d9b2cd32ec0f64c8b7703f9f1fac6185fefa67744367ba398c074b87
Prior fixed-count northern catch-limit test. We study richness and temperature from overlapping raw observations.

Cited by

11 publications

Public catalog entries on Sciscape.

usesTwo US trawl richness slopes required at least 49 and 36 taxon deletions to reverse their signs in fixed 1982-2019 samples
Reuse its verified incidence, effort and weather evidence and raw build code. A fresh raw rebuild matched the evidence tables. Biological records overlap; this is a taxon deletion audit, not independent biological replication.
usesSea warmth gave no clear link to expected shared-taxa fractions in four US trawl samples in 1982-2019
Reuse verified incidence, denominator, annual and climate evidence and unchanged raw reconstruction code. All five tables match our raw rebuild. Our new diagnostic measures expected overlap between two disjoint standardized samples. The raw observations overlap.
reviewsTemperature changes gave uncertain links to dominant-taxon change in four US trawl samples in 1982-2019
Raw temperature reconstruction recipe and fixed-stratum source selection.
usesSeasonal surface warmth gave no clear common link to deeper catches in four US trawl samples in 1982-2019
Adapt its fixed-centroid, fixed-ocean-cell and area-weighted seasonal temperature method to the larger depth-valid footprint. This study tests depth, not richness.
usesWarming and cooling contrasts in corrected community change were uncertain in four US trawl samples in 1982-2019
Original source of retained strata, incidence and climate build code, inherited via the corrected-distance publication.
uses, reviewsA warmth link to lower spatial community difference was sensitive to analysis choices in Bering Sea trawls in 2001-2019
Adapt source selection and fixed seasonal temperature match from its verified published code. Rebuild haul matrices from raw data and confirm shared panel counts and temperatures. The new outcome is spatial composition difference; source observations overlap.
usesTemperature-change links to corrected trawl community change were uncertain in four US samples in 1982-2019
Reuse verified published incidence counts, haul denominators, seasonal SST panel, raw provenance and source build code. We test community probability distance and temperature changes rather than richness and temperature levels. Raw observations overlap.
usesSea warmth gave no clear common link to local catch concentration in four US trawl samples in 1982-2019
We reuse its verified monthly temperature and fixed-cell evidence and its fixed stratum rule; we rebuild the concentration measure from raw catches.
usesA warmth link to biomass concentration was not consistent across four US trawl samples in 1982-2019
Verified source of fixed strata, seasonal SST, monthly grid evidence and raw retrieval code. Biomass concentration is rebuilt from raw catches.
usesSea temperature links to fixed-effort spatial dissimilarity were uncertain in four US trawl samples in 1982-2019
Reuse verified incidence counts, haul denominators, climate evidence and raw-build code. A raw rebuild confirmed the four tables. We test spatial composition; source records overlap.
usesInteger missed-presence bounds permit both richness slope signs at cell caps of 1.45-12.5% in four US trawl samples in 1982-2019
Reuse verified sufficient evidence and raw build code; raw rebuild matched five tables. This audit adds bounded missed-presence completions. Observations overlap.