Each bar is a species; length is total individuals caught, and the label shows catch per 100 trap-nights so effort is accounted for.
Activity, not density. Pitfall catch โ activity ร density, so fast, large, surface-active hunters (tiger beetles, Pasimachus ) score high regardless of true abundance, so compare like body plans, not a tiger beetle against a litter specialist.
Pitfall catch is activity times density, so active surface hunters score high โ it is not a head count.
The share of sampling bouts (a plot on a date) in which each species turned up at least once, that is how widespread it is, not how abundant. A beetle can be abundant but patchy (a long bar above, short here) or sparse but everywhere .
Two caveats. It's naive , not corrected for detection. And the denominator is bouts that caught at least one ground beetle (bouts with no carabids at all, rare in the active season, aren't in the data), so it slightly over-states how widespread a species is. Species-level IDs only.
Meet the beetles
A quick honesty pass over this site's records. Each flag is a verify, not wrong note: something worth a second look, not an error.
Tap a flag to list the exact records behind it, and download any flag (or the whole report) as a CSV.
Diversity in one unit, an effective number of species :
- q0 richness (all species count equally)
- q1 exp(Shannon), common species
- q2 inverse Simpson, dominant species
When q1 sits near q0 the community is even; far below = a few species dominate.
Expected species in a random subsample of n individuals (Hurlbert 1971), with an approximate เฌ SD band (an independent-species approximation; Heck et al. 1975). Comparing at equal n stops a site that simply caught more beetles from looking falsely richer.
As pitfall bouts accumulate, how many species have appeared? A flattening curve means the site's fauna is well sampled (averaged over random bout orders; Gotelli & Colwell 2001).
Species ranked from most to least abundant (log scale). The shape is the evenness story: a steep drop means a few species dominate; a shallow line means an even community, the same signal the Hill numbers above put into one number.
For every co-located NEON driver, we scan lags 0โ12 months and keep the strongest correlation with monthly catch-per-effort, after deseasonalizing both (so r reflects year-to-year anomalies, not the shared summer peak).
Reading r: it runs โ1โฆ+1, where sign is the direction and size is how tightly they move together. It is not the % of activity explained (that's rยฒ). Colour encodes the driver's identity; bar side-of-0 encodes the sign.
Correlation, not cause. Drivers co-vary and many lags are scanned, so read it as a lead to investigate.
Mean catch per 100 trap-nights by calendar month, the whole-community activity curve, pooling every ground beetle (Carabidae) trapped at this site, including records left at genus/family. Toggle to split it by the top species.
Top species (rows) ร calendar month (columns); each cell is that month's catch per 100 trap-nights , darker = more active. A month sampled but with none of that species is a real 0 ; a month never sampled is left blank (a gap, not a zero). The pooled activity curve above hides that species peak at different times.
Each point is one month: its catch per 100 trap-nights against the selected driver's value (with your lag applied). A rising cloud means more beetles when the driver is high; the dashed line is an OLS fit, the same signal as the ranking above, shown as a shape so you can spot thresholds.
Annual catch per 100 trap-nights (or raw counts when a bundle lacks effort), with an ordinary-least-squares trend line.
The slope and its p-value drive the verdict above. Short series (a few years) are noisy, so read the direction, not the decimal.
Carabid richness across NEON
Each marker is a NEON site with beetle data. With no species picked, markers size by total richness; choose a species to map its range, sized by local abundance. Tap a site to load it.
Every point is a site ร year beetle community, placed by BrayโCurtis dissimilarity (PCoA) so similar communities sit close together.
Points from the same site/biome cluster, the carabid biogeography signal. Computed across all bundled sites.
The DufrรชneโLegendre IndVal (0โ100) flags species that are both concentrated in and reliably found at one site.
- Specificity : share of the species' abundance that's at that site
- Fidelity : share of that site's samples where it turns up
High on both = a genuine signature of that place. Computed across all bundled sites; samples are plot ร year.
Search the network
Look across every NEON site at once. Find one beetle and see everywhere it has been caught, or pull up the sites that match a number. This searches a small bundled index, so it is instant and never goes online.
Activity-density is catch per 100 trap-nights at that site, a within-site activity index, not an absolute population density. Sites differ in habitat and effort, so read it as where a beetle turns up, not a ranking of how many there really are.
Introduced carabids are established non-native European species (Bousquet 2012; Lindroth 1961-69); a high rank for one usually marks a disturbed or human-modified site, not a rich one. Activity-density is catch per 100 trap-nights, a within-site index, not an absolute density.