Biodiversity Games: Eight Individuals, How Many Labels?

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<body class="classroom"><main><header><div class="eyebrow">Classroom practice · fictional data</div><h1>Biodiversity Games: Eight Individuals, How Many Labels?</h1><p>Eight cards do not necessarily mean eight species. Put sample A beside sample B and ask students to count individual IDs before counting species labels. <mark>Both samples contain eight individuals</mark>, but their supplied labels tell different stories.</p></header>
<nav><button type="button" id="sampleA">Sample A</button><button type="button" id="sampleB">Sample B</button><button type="button" id="duplicate">Duplicate B01</button><button type="button" id="unknown">Unknown B08</button><button type="button" id="conflict">Conflicting B01</button><button type="button" id="filterS1">S1 only</button><button type="button" id="all">All labels</button><button type="button" id="reset">Reset</button></nav><p id="result" class="result" role="status"></p><div id="ledger" class="ledger"></div><p>Species-label richness only. Genetic and ecosystem dimensions remain unknown.</p><section><h2>Check the whole-sample counts</h2><label for="individualCount">Distinct individuals</label><input id="individualCount"><label for="knownCount">Distinct known species labels</label><input id="knownCount"><button type="button" id="checkCounts">Check counts</button><p id="countFeedback" role="status">Unanswered.</p></section>
<footer>Original supplied example. Local state lasts only while this page remains open.</footer></main><script>
(()=>{'use strict';const q=id=>document.querySelector('#'+id);const set=(id,value)=>{q(id).textContent=String(value);};const on=(id,callback)=>q(id).addEventListener('click',callback);const escapeHtml=value=>String(value).replace(/[&<>"']/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;',"'":'&#39;'}[c]));const table=(id,heads,rows)=>{q(id).innerHTML='<table><thead><tr>'+heads.map(h=>'<th scope="col">'+escapeHtml(h)+'</th>').join('')+'</tr></thead><tbody>'+rows.map(row=>'<tr>'+row.map(value=>'<td>'+escapeHtml(value)+'</td>').join('')+'</tr>').join('')+'</tbody></table>';};const field=(id,label,value='')=>'<label for="'+id+'">'+escapeHtml(label)+'</label><input id="'+id+'" value="'+escapeHtml(value)+'">';const btn=(id,label)=>'<button type="button" id="'+id+'">'+escapeHtml(label)+'</button>';const fmt=value=>Number(value).toFixed(6);
(function(){
 let sample='A',variant='base',filter='';
 function render(){set("countFeedback","Unanswered.");q("individualCount").value="";q("knownCount").value="";let rows=Array.from({length:8},(_,i)=>({id:sample+String(i+1).padStart(2,'0'),label:sample==='A'||i<4?'S1':i<6?'S2':'S3'}));if(sample==='B'&&variant==='dup')rows.push({id:'B01',label:'S1'});if(sample==='B'&&variant==='unknown')rows[7].label='Unknown';if(sample==='B'&&variant==='conflict')rows.push({id:'B01',label:'S2'});const ids=new Set(rows.map(x=>x.id)),known=new Set(rows.filter(x=>x.label!=='Unknown').map(x=>x.label)),visible=rows.filter(x=>!filter||x.label===filter);set('result',`${rows.length} report rows; ${ids.size} individuals; ${known.size} distinct known species labels. ${variant==='unknown'?'1 unresolved individual label; species tally incomplete.':variant==='conflict'?'B01 has conflicting labels: review required; revised assignment unverified.':'Complete supplied labels.'} Visible ${filter||'all-label'} subset: ${new Set(visible.map(x=>x.id)).size} individuals, ${new Set(visible.filter(x=>x.label!=='Unknown').map(x=>x.label)).size} known labels.`);table('ledger',['Individual ID','Supplied label'],visible.map(x=>[x.id,x.label]));}
 on('sampleA',()=>{sample='A';variant='base';filter='';render();});on('sampleB',()=>{sample='B';variant='base';filter='';render();});for(const[id,v]of[['duplicate','dup'],['unknown','unknown'],['conflict','conflict']])on(id,()=>{sample='B';variant=v;filter='';render();});on('filterS1',()=>{filter='S1';render();});on('all',()=>{filter='';render();});on('reset',()=>{sample='A';variant='base';filter='';render();});render();
for(const id of ['individualCount','knownCount'])q(id).addEventListener('input',()=>set('countFeedback','Counts changed. Check both answers again.'));
on('checkCounts',()=>{const a=q('individualCount').value.trim(),b=q('knownCount').value.trim();if(!/^\d+$/.test(a)||!/^\d+$/.test(b))return set('countFeedback','Enter both whole-number counts; blank is unanswered.');const matches=Number(a)===8&&Number(b)===(sample==='A'?1:3);set('countFeedback',matches?'Correct distinct counts. '+(variant==='unknown'?'Species tally remains incomplete.':variant==='conflict'?'Conflicting label assignment still requires review.':'Explain why IDs and labels are counted separately.'):'Recount distinct IDs and distinct known labels for the whole sample, not just the filter.');});
})();})();
</script></body></html>